feat: add ToolSearchTool for on-demand tool discovery

Implements Anthropic's Tool Search Tool pattern for on-demand tool loading,
reducing token consumption when working with large tool libraries.

Features:
- ToolSearchTool class that searches through a catalog of tools
- Keyword-based search with relevance scoring (default)
- Regex-based search as alternative strategy
- Support for custom search functions
- Tool catalog management (add, remove, list tools)
- Returns JSON with tool definitions including name, description, and args_schema

Closes #4224

Co-Authored-By: João <joao@crewai.com>

docs/en/learn/a2a-agent-delegation.mdx

@@ -91,10 +91,6 @@ The `A2AConfig` class accepts the following parameters:
   Update mechanism for receiving task status. Options: `StreamingConfig`, `PollingConfig`, or `PushNotificationConfig`.
 </ParamField>
 
-<ParamField path="transport_protocol" type="Literal['JSONRPC', 'GRPC', 'HTTP+JSON']" default="JSONRPC">
-  Transport protocol for A2A communication. Options: `JSONRPC` (default), `GRPC`, or `HTTP+JSON`.
-</ParamField>
-
 ## Authentication
 
 For A2A agents that require authentication, use one of the provided auth schemes:

lib/crewai/src/crewai/a2a/config.py

@@ -5,7 +5,7 @@ This module is separate from experimental.a2a to avoid circular imports.
 
 from __future__ import annotations
 
-from typing import Annotated, Any, ClassVar, Literal
+from typing import Annotated, Any, ClassVar
 
 from pydantic import (
     BaseModel,
@@ -53,7 +53,6 @@ class A2AConfig(BaseModel):
         fail_fast: If True, raise error when agent unreachable; if False, skip and continue.
         trust_remote_completion_status: If True, return A2A agent's result directly when completed.
         updates: Update mechanism config.
-        transport_protocol: A2A transport protocol (grpc, jsonrpc, http+json).
     """
 
     model_config: ClassVar[ConfigDict] = ConfigDict(extra="forbid")
@@ -83,7 +82,3 @@ class A2AConfig(BaseModel):
         default_factory=_get_default_update_config,
         description="Update mechanism config",
     )
-    transport_protocol: Literal["JSONRPC", "GRPC", "HTTP+JSON"] = Field(
-        default="JSONRPC",
-        description="Specified mode of A2A transport protocol",
-    )

lib/crewai/src/crewai/a2a/utils.py

@@ -7,7 +7,7 @@ from collections.abc import AsyncIterator, MutableMapping
 from contextlib import asynccontextmanager
 from functools import lru_cache
 import time
-from typing import TYPE_CHECKING, Any, Literal
+from typing import TYPE_CHECKING, Any
 import uuid
 
 from a2a.client import A2AClientHTTPError, Client, ClientConfig, ClientFactory
@@ -18,6 +18,7 @@ from a2a.types import (
     PushNotificationConfig as A2APushNotificationConfig,
     Role,
     TextPart,
+    TransportProtocol,
 )
 from aiocache import cached  # type: ignore[import-untyped]
 from aiocache.serializers import PickleSerializer  # type: ignore[import-untyped]
@@ -258,7 +259,6 @@ async def _afetch_agent_card_impl(
 
 def execute_a2a_delegation(
     endpoint: str,
-    transport_protocol: Literal["JSONRPC", "GRPC", "HTTP+JSON"],
     auth: AuthScheme | None,
     timeout: int,
     task_description: str,
@@ -282,23 +282,6 @@ def execute_a2a_delegation(
     use aexecute_a2a_delegation directly.
 
     Args:
-        endpoint: A2A agent endpoint URL (AgentCard URL)
-        transport_protocol: Optional A2A transport protocol (grpc, jsonrpc, http+json)
-        auth: Optional AuthScheme for authentication (Bearer, OAuth2, API Key, HTTP Basic/Digest)
-        timeout: Request timeout in seconds
-        task_description: The task to delegate
-        context: Optional context information
-        context_id: Context ID for correlating messages/tasks
-        task_id: Specific task identifier
-        reference_task_ids: List of related task IDs
-        metadata: Additional metadata (external_id, request_id, etc.)
-        extensions: Protocol extensions for custom fields
-        conversation_history: Previous Message objects from conversation
-        agent_id: Agent identifier for logging
-        agent_role: Role of the CrewAI agent delegating the task
-        agent_branch: Optional agent tree branch for logging
-        response_model: Optional Pydantic model for structured outputs
-        turn_number: Optional turn number for multi-turn conversations
         endpoint: A2A agent endpoint URL.
         auth: Optional AuthScheme for authentication.
         timeout: Request timeout in seconds.
@@ -340,7 +323,6 @@ def execute_a2a_delegation(
                 agent_role=agent_role,
                 agent_branch=agent_branch,
                 response_model=response_model,
-                transport_protocol=transport_protocol,
                 turn_number=turn_number,
                 updates=updates,
             )
@@ -351,7 +333,6 @@ def execute_a2a_delegation(
 
 async def aexecute_a2a_delegation(
     endpoint: str,
-    transport_protocol: Literal["JSONRPC", "GRPC", "HTTP+JSON"],
     auth: AuthScheme | None,
     timeout: int,
     task_description: str,
@@ -375,23 +356,6 @@ async def aexecute_a2a_delegation(
     in an async context (e.g., with Crew.akickoff() or agent.aexecute_task()).
 
     Args:
-        endpoint: A2A agent endpoint URL
-        transport_protocol: Optional A2A transport protocol (grpc, jsonrpc, http+json)
-        auth: Optional AuthScheme for authentication
-        timeout: Request timeout in seconds
-        task_description: Task to delegate
-        context: Optional context
-        context_id: Context ID for correlation
-        task_id: Specific task identifier
-        reference_task_ids: Related task IDs
-        metadata: Additional metadata
-        extensions: Protocol extensions
-        conversation_history: Previous Message objects
-        turn_number: Current turn number
-        agent_branch: Agent tree branch for logging
-        agent_id: Agent identifier for logging
-        agent_role: Agent role for logging
-        response_model: Optional Pydantic model for structured outputs
         endpoint: A2A agent endpoint URL.
         auth: Optional AuthScheme for authentication.
         timeout: Request timeout in seconds.
@@ -450,7 +414,6 @@ async def aexecute_a2a_delegation(
         agent_role=agent_role,
         response_model=response_model,
         updates=updates,
-        transport_protocol=transport_protocol,
     )
 
     crewai_event_bus.emit(
@@ -468,7 +431,6 @@ async def aexecute_a2a_delegation(
 
 async def _aexecute_a2a_delegation_impl(
     endpoint: str,
-    transport_protocol: Literal["JSONRPC", "GRPC", "HTTP+JSON"],
     auth: AuthScheme | None,
     timeout: int,
     task_description: str,
@@ -562,6 +524,7 @@ async def _aexecute_a2a_delegation_impl(
         extensions=extensions,
     )
 
+    transport_protocol = TransportProtocol("JSONRPC")
     new_messages: list[Message] = [*conversation_history, message]
     crewai_event_bus.emit(
         None,
@@ -633,7 +596,7 @@ async def _aexecute_a2a_delegation_impl(
 @asynccontextmanager
 async def _create_a2a_client(
     agent_card: AgentCard,
-    transport_protocol: Literal["JSONRPC", "GRPC", "HTTP+JSON"],
+    transport_protocol: TransportProtocol,
     timeout: int,
     headers: MutableMapping[str, str],
     streaming: bool,
@@ -677,7 +640,7 @@ async def _create_a2a_client(
 
         config = ClientConfig(
             httpx_client=httpx_client,
-            supported_transports=[transport_protocol],
+            supported_transports=[str(transport_protocol.value)],
             streaming=streaming and not use_polling,
             polling=use_polling,
             accepted_output_modes=["application/json"],

lib/crewai/src/crewai/a2a/wrapper.py

@@ -771,7 +771,6 @@ def _delegate_to_a2a(
                 response_model=agent_config.response_model,
                 turn_number=turn_num + 1,
                 updates=agent_config.updates,
-                transport_protocol=agent_config.transport_protocol,
             )
 
             conversation_history = a2a_result.get("history", [])
@@ -1086,7 +1085,6 @@ async def _adelegate_to_a2a(
                 agent_branch=agent_branch,
                 response_model=agent_config.response_model,
                 turn_number=turn_num + 1,
-                transport_protocol=agent_config.transport_protocol,
                 updates=agent_config.updates,
             )
 

lib/crewai/src/crewai/experimental/__init__.py

@@ -1,12 +1,4 @@
 from crewai.experimental.crew_agent_executor_flow import CrewAgentExecutorFlow
-from crewai.experimental.environment_tools import (
-    BaseEnvironmentTool,
-    EnvironmentTools,
-    FileReadTool,
-    FileSearchTool,
-    GrepTool,
-    ListDirTool,
-)
 from crewai.experimental.evaluation import (
     AgentEvaluationResult,
     AgentEvaluator,
@@ -31,20 +23,14 @@ from crewai.experimental.evaluation import (
 __all__ = [
     "AgentEvaluationResult",
     "AgentEvaluator",
-    "BaseEnvironmentTool",
     "BaseEvaluator",
     "CrewAgentExecutorFlow",
-    "EnvironmentTools",
     "EvaluationScore",
     "EvaluationTraceCallback",
     "ExperimentResult",
     "ExperimentResults",
     "ExperimentRunner",
-    "FileReadTool",
-    "FileSearchTool",
     "GoalAlignmentEvaluator",
-    "GrepTool",
-    "ListDirTool",
     "MetricCategory",
     "ParameterExtractionEvaluator",
     "ReasoningEfficiencyEvaluator",

lib/crewai/src/crewai/experimental/environment_tools/__init__.py

@@ -1,24 +0,0 @@
-"""Environment tools for file system operations.
-
-These tools provide agents with the ability to explore and read from
-the filesystem for context engineering purposes.
-"""
-
-from crewai.experimental.environment_tools.base_environment_tool import (
-    BaseEnvironmentTool,
-)
-from crewai.experimental.environment_tools.environment_tools import EnvironmentTools
-from crewai.experimental.environment_tools.file_read_tool import FileReadTool
-from crewai.experimental.environment_tools.file_search_tool import FileSearchTool
-from crewai.experimental.environment_tools.grep_tool import GrepTool
-from crewai.experimental.environment_tools.list_dir_tool import ListDirTool
-
-
-__all__ = [
-    "BaseEnvironmentTool",
-    "EnvironmentTools",
-    "FileReadTool",
-    "FileSearchTool",
-    "GrepTool",
-    "ListDirTool",
-]

lib/crewai/src/crewai/experimental/environment_tools/base_environment_tool.py

@@ -1,84 +0,0 @@
-"""Base class for environment tools with path security."""
-
-from __future__ import annotations
-
-from pathlib import Path
-from typing import Any
-
-from pydantic import Field
-
-from crewai.tools.base_tool import BaseTool
-
-
-class BaseEnvironmentTool(BaseTool):
-    """Base class for environment/file system tools with path security.
-
-    Provides path validation to restrict file operations to allowed directories.
-    This prevents path traversal attacks and enforces security sandboxing.
-
-    Attributes:
-        allowed_paths: List of paths that operations are restricted to.
-            Empty list means allow all paths (no restrictions).
-    """
-
-    allowed_paths: list[str] = Field(
-        default_factory=lambda: ["."],
-        description="Restrict operations to these paths. Defaults to current directory.",
-    )
-
-    def _validate_path(self, path: str) -> tuple[bool, Path | str]:
-        """Validate and resolve a path against allowed_paths whitelist.
-
-        Args:
-            path: The path to validate.
-
-        Returns:
-            A tuple of (is_valid, result) where:
-            - If valid: (True, resolved_path as Path)
-            - If invalid: (False, error_message as str)
-        """
-        try:
-            resolved = Path(path).resolve()
-
-            # If no restrictions, allow all paths
-            if not self.allowed_paths:
-                return True, resolved
-
-            # Check if path is within any allowed path
-            for allowed in self.allowed_paths:
-                allowed_resolved = Path(allowed).resolve()
-                try:
-                    # This will raise ValueError if resolved is not relative to allowed_resolved
-                    resolved.relative_to(allowed_resolved)
-                    return True, resolved
-                except ValueError:
-                    continue
-
-            return (
-                False,
-                f"Path '{path}' is outside allowed paths: {self.allowed_paths}",
-            )
-
-        except Exception as e:
-            return False, f"Invalid path '{path}': {e}"
-
-    def _format_size(self, size: int) -> str:
-        """Format file size in human-readable format.
-
-        Args:
-            size: Size in bytes.
-
-        Returns:
-            Human-readable size string (e.g., "1.5KB", "2.3MB").
-        """
-        if size < 1024:
-            return f"{size}B"
-        if size < 1024 * 1024:
-            return f"{size / 1024:.1f}KB"
-        if size < 1024 * 1024 * 1024:
-            return f"{size / (1024 * 1024):.1f}MB"
-        return f"{size / (1024 * 1024 * 1024):.1f}GB"
-
-    def _run(self, *args: Any, **kwargs: Any) -> Any:
-        """Subclasses must implement this method."""
-        raise NotImplementedError("Subclasses must implement _run method")

lib/crewai/src/crewai/experimental/environment_tools/environment_tools.py

@@ -1,77 +0,0 @@
-"""Manager class for environment tools."""
-
-from __future__ import annotations
-
-from typing import TYPE_CHECKING
-
-from crewai.experimental.environment_tools.file_read_tool import FileReadTool
-from crewai.experimental.environment_tools.file_search_tool import FileSearchTool
-from crewai.experimental.environment_tools.grep_tool import GrepTool
-from crewai.experimental.environment_tools.list_dir_tool import ListDirTool
-
-
-if TYPE_CHECKING:
-    from crewai.tools.base_tool import BaseTool
-
-
-class EnvironmentTools:
-    """Manager class for file system/environment tools.
-
-    Provides a convenient way to create a set of file system tools
-    with shared security configuration (allowed_paths).
-
-    Similar to AgentTools but for file system operations. Use this to
-    give agents the ability to explore and read files for context engineering.
-
-    Example:
-        from crewai.experimental import EnvironmentTools
-
-        # Create tools with security sandbox
-        env_tools = EnvironmentTools(
-            allowed_paths=["./src", "./docs"],
-        )
-
-        # Use with an agent
-        agent = Agent(
-            role="Code Analyst",
-            tools=env_tools.tools(),
-        )
-    """
-
-    def __init__(
-        self,
-        allowed_paths: list[str] | None = None,
-        include_grep: bool = True,
-        include_search: bool = True,
-    ) -> None:
-        """Initialize EnvironmentTools.
-
-        Args:
-            allowed_paths: List of paths to restrict operations to.
-                Defaults to current directory ["."] if None.
-                Pass empty list [] to allow all paths (not recommended).
-            include_grep: Whether to include GrepTool (requires grep installed).
-            include_search: Whether to include FileSearchTool.
-        """
-        self.allowed_paths = allowed_paths if allowed_paths is not None else ["."]
-        self.include_grep = include_grep
-        self.include_search = include_search
-
-    def tools(self) -> list[BaseTool]:
-        """Get all configured environment tools.
-
-        Returns:
-            List of BaseTool instances with shared allowed_paths configuration.
-        """
-        tool_list: list[BaseTool] = [
-            FileReadTool(allowed_paths=self.allowed_paths),
-            ListDirTool(allowed_paths=self.allowed_paths),
-        ]
-
-        if self.include_grep:
-            tool_list.append(GrepTool(allowed_paths=self.allowed_paths))
-
-        if self.include_search:
-            tool_list.append(FileSearchTool(allowed_paths=self.allowed_paths))
-
-        return tool_list

lib/crewai/src/crewai/experimental/environment_tools/file_read_tool.py

@@ -1,124 +0,0 @@
-"""Tool for reading file contents."""
-
-from __future__ import annotations
-
-from pathlib import Path
-
-from pydantic import BaseModel, Field
-
-from crewai.experimental.environment_tools.base_environment_tool import (
-    BaseEnvironmentTool,
-)
-
-
-class FileReadInput(BaseModel):
-    """Input schema for reading files."""
-
-    path: str = Field(..., description="Path to the file to read")
-    start_line: int | None = Field(
-        default=None,
-        description="Line to start reading from (1-indexed). If None, starts from beginning.",
-    )
-    line_count: int | None = Field(
-        default=None,
-        description="Number of lines to read. If None, reads to end of file.",
-    )
-
-
-class FileReadTool(BaseEnvironmentTool):
-    """Read contents of text files with optional line ranges.
-
-    Use this tool to:
-    - Read configuration files, source code, logs
-    - Inspect file contents before making decisions
-    - Load reference documentation or data files
-
-    Supports reading entire files or specific line ranges for efficiency.
-    """
-
-    name: str = "read_file"
-    description: str = """Read the contents of a text file.
-
-Use this to read configuration files, source code, logs, or any text file.
-You can optionally specify start_line and line_count to read specific portions.
-
-Examples:
-- Read entire file: path="config.yaml"
-- Read lines 100-149: path="large.log", start_line=100, line_count=50
-"""
-    args_schema: type[BaseModel] = FileReadInput
-
-    def _run(
-        self,
-        path: str,
-        start_line: int | None = None,
-        line_count: int | None = None,
-    ) -> str:
-        """Read file contents with optional line range.
-
-        Args:
-            path: Path to the file to read.
-            start_line: Line to start reading from (1-indexed).
-            line_count: Number of lines to read.
-
-        Returns:
-            File contents with metadata header, or error message.
-        """
-        # Validate path against allowed_paths
-        valid, result = self._validate_path(path)
-        if not valid:
-            return f"Error: {result}"
-
-        assert isinstance(result, Path)  # noqa: S101
-        file_path = result
-
-        # Check file exists and is a file
-        if not file_path.exists():
-            return f"Error: File not found: {path}"
-
-        if not file_path.is_file():
-            return f"Error: Not a file: {path}"
-
-        try:
-            with open(file_path, "r", encoding="utf-8") as f:
-                if start_line is None and line_count is None:
-                    # Read entire file
-                    content = f.read()
-                else:
-                    # Read specific line range
-                    lines = f.readlines()
-                    start_idx = (start_line or 1) - 1  # Convert to 0-indexed
-                    start_idx = max(0, start_idx)  # Ensure non-negative
-
-                    if line_count is not None:
-                        end_idx = start_idx + line_count
-                    else:
-                        end_idx = len(lines)
-
-                    content = "".join(lines[start_idx:end_idx])
-
-            # Get file metadata
-            stat = file_path.stat()
-            total_lines = content.count("\n") + (
-                1 if content and not content.endswith("\n") else 0
-            )
-
-            # Format output with metadata header
-            header = f"File: {path}\n"
-            header += f"Size: {self._format_size(stat.st_size)} | Lines: {total_lines}"
-
-            if start_line is not None or line_count is not None:
-                header += (
-                    f" | Range: {start_line or 1}-{(start_line or 1) + total_lines - 1}"
-                )
-
-            header += "\n" + "=" * 60 + "\n"
-
-            return header + content
-
-        except UnicodeDecodeError:
-            return f"Error: File is not a text file or has encoding issues: {path}"
-        except PermissionError:
-            return f"Error: Permission denied: {path}"
-        except Exception as e:
-            return f"Error reading file: {e}"

lib/crewai/src/crewai/experimental/environment_tools/file_search_tool.py

@@ -1,127 +0,0 @@
-"""Tool for finding files by name pattern."""
-
-from __future__ import annotations
-
-from typing import Literal
-
-from pydantic import BaseModel, Field
-
-from crewai.experimental.environment_tools.base_environment_tool import (
-    BaseEnvironmentTool,
-)
-
-
-class FileSearchInput(BaseModel):
-    """Input schema for file search."""
-
-    pattern: str = Field(
-        ...,
-        description="Filename pattern to search for (glob syntax, e.g., '*.py', 'test_*.py')",
-    )
-    path: str = Field(
-        default=".",
-        description="Directory to search in",
-    )
-    file_type: Literal["file", "dir", "all"] | None = Field(
-        default="all",
-        description="Filter by type: 'file' for files only, 'dir' for directories only, 'all' for both",
-    )
-
-
-class FileSearchTool(BaseEnvironmentTool):
-    """Find files by name pattern.
-
-    Use this tool to:
-    - Find specific files in a codebase
-    - Locate configuration files
-    - Search for files matching a pattern
-    """
-
-    name: str = "find_files"
-    description: str = """Find files by name pattern using glob syntax.
-
-Searches recursively through directories to find matching files.
-
-Examples:
-- Find Python files: pattern="*.py", path="src/"
-- Find test files: pattern="test_*.py"
-- Find configs: pattern="*.yaml", path="."
-- Find directories only: pattern="*", file_type="dir"
-"""
-    args_schema: type[BaseModel] = FileSearchInput
-
-    def _run(
-        self,
-        pattern: str,
-        path: str = ".",
-        file_type: Literal["file", "dir", "all"] | None = "all",
-    ) -> str:
-        """Find files matching a pattern.
-
-        Args:
-            pattern: Glob pattern for filenames.
-            path: Directory to search in.
-            file_type: Filter by type ('file', 'dir', or 'all').
-
-        Returns:
-            List of matching files or error message.
-        """
-        # Validate path against allowed_paths
-        valid, result = self._validate_path(path)
-        if not valid:
-            return f"Error: {result}"
-
-        search_path = result
-
-        # Check directory exists
-        if not search_path.exists():
-            return f"Error: Directory not found: {path}"
-
-        if not search_path.is_dir():
-            return f"Error: Not a directory: {path}"
-
-        try:
-            # Find matching entries recursively
-            matches = list(search_path.rglob(pattern))
-
-            # Filter by type
-            if file_type == "file":
-                matches = [m for m in matches if m.is_file()]
-            elif file_type == "dir":
-                matches = [m for m in matches if m.is_dir()]
-
-            # Filter out hidden files
-            matches = [
-                m for m in matches if not any(part.startswith(".") for part in m.parts)
-            ]
-
-            # Sort alphabetically
-            matches.sort(key=lambda x: str(x).lower())
-
-            if not matches:
-                return f"No {file_type if file_type != 'all' else 'files'} matching '{pattern}' found in {path}"
-
-            # Format output
-            result_lines = [f"Found {len(matches)} matches for '{pattern}' in {path}:"]
-            result_lines.append("=" * 60)
-
-            for match in matches:
-                # Get relative path from search directory
-                rel_path = match.relative_to(search_path)
-
-                if match.is_dir():
-                    result_lines.append(f"📁 {rel_path}/")
-                else:
-                    try:
-                        size = match.stat().st_size
-                    except (OSError, PermissionError):
-                        continue  # Skip files we can't stat
-                    size_str = self._format_size(size)
-                    result_lines.append(f"📄 {rel_path} ({size_str})")
-
-            return "\n".join(result_lines)
-
-        except PermissionError:
-            return f"Error: Permission denied: {path}"
-        except Exception as e:
-            return f"Error searching files: {e}"

lib/crewai/src/crewai/experimental/environment_tools/grep_tool.py

@@ -1,149 +0,0 @@
-"""Tool for searching patterns in files using grep."""
-
-from __future__ import annotations
-
-import subprocess
-
-from pydantic import BaseModel, Field
-
-from crewai.experimental.environment_tools.base_environment_tool import (
-    BaseEnvironmentTool,
-)
-
-
-class GrepInput(BaseModel):
-    """Input schema for grep search."""
-
-    pattern: str = Field(..., description="Search pattern (supports regex)")
-    path: str = Field(..., description="File or directory to search in")
-    recursive: bool = Field(
-        default=True,
-        description="Search recursively in directories",
-    )
-    ignore_case: bool = Field(
-        default=False,
-        description="Case-insensitive search",
-    )
-    context_lines: int = Field(
-        default=2,
-        description="Number of context lines to show before/after matches",
-    )
-
-
-class GrepTool(BaseEnvironmentTool):
-    """Search for text patterns in files using grep.
-
-    Use this tool to:
-    - Find where a function or class is defined
-    - Search for error messages in logs
-    - Locate configuration values
-    - Find TODO comments or specific patterns
-    """
-
-    name: str = "grep_search"
-    description: str = """Search for text patterns in files using grep.
-
-Supports regex patterns. Returns matching lines with context.
-
-Examples:
-- Find function: pattern="def process_data", path="src/"
-- Search logs: pattern="ERROR", path="logs/app.log"
-- Case-insensitive: pattern="todo", path=".", ignore_case=True
-"""
-    args_schema: type[BaseModel] = GrepInput
-
-    def _run(
-        self,
-        pattern: str,
-        path: str,
-        recursive: bool = True,
-        ignore_case: bool = False,
-        context_lines: int = 2,
-    ) -> str:
-        """Search for patterns in files.
-
-        Args:
-            pattern: Search pattern (regex supported).
-            path: File or directory to search in.
-            recursive: Whether to search recursively.
-            ignore_case: Whether to ignore case.
-            context_lines: Lines of context around matches.
-
-        Returns:
-            Search results or error message.
-        """
-        # Validate path against allowed_paths
-        valid, result = self._validate_path(path)
-        if not valid:
-            return f"Error: {result}"
-
-        search_path = result
-
-        # Check path exists
-        if not search_path.exists():
-            return f"Error: Path not found: {path}"
-
-        try:
-            # Build grep command safely
-            cmd = ["grep", "--color=never"]
-
-            # Add recursive flag if searching directory
-            if recursive and search_path.is_dir():
-                cmd.append("-r")
-
-            # Case insensitive
-            if ignore_case:
-                cmd.append("-i")
-
-            # Context lines
-            if context_lines > 0:
-                cmd.extend(["-C", str(context_lines)])
-
-            # Show line numbers
-            cmd.append("-n")
-
-            # Use -- to prevent pattern from being interpreted as option
-            cmd.append("--")
-            cmd.append(pattern)
-            cmd.append(str(search_path))
-
-            # Execute with timeout
-            # Security: cmd is a list (no shell injection), path is validated above
-            result = subprocess.run(  # noqa: S603
-                cmd,
-                capture_output=True,
-                text=True,
-                timeout=30,
-            )
-
-            if result.returncode == 0:
-                # Found matches
-                output = result.stdout
-                # Count actual match lines (not context lines)
-                match_lines = [
-                    line
-                    for line in output.split("\n")
-                    if line and not line.startswith("--")
-                ]
-                match_count = len(match_lines)
-
-                header = f"Found {match_count} matches for '{pattern}' in {path}\n"
-                header += "=" * 60 + "\n"
-                return header + output
-
-            if result.returncode == 1:
-                # No matches found (grep returns 1 for no matches)
-                return f"No matches found for '{pattern}' in {path}"
-
-            # Error occurred
-            error_msg = result.stderr.strip() if result.stderr else "Unknown error"
-            return f"Error: {error_msg}"
-
-        except subprocess.TimeoutExpired:
-            return "Error: Search timed out (>30s). Try narrowing the search path."
-        except FileNotFoundError:
-            return (
-                "Error: grep command not found. Ensure grep is installed on the system."
-            )
-        except Exception as e:
-            return f"Error during search: {e}"

lib/crewai/src/crewai/experimental/environment_tools/list_dir_tool.py

@@ -1,147 +0,0 @@
-"""Tool for listing directory contents."""
-
-from __future__ import annotations
-
-from pathlib import Path
-
-from pydantic import BaseModel, Field
-
-from crewai.experimental.environment_tools.base_environment_tool import (
-    BaseEnvironmentTool,
-)
-
-
-class ListDirInput(BaseModel):
-    """Input schema for listing directories."""
-
-    path: str = Field(default=".", description="Directory path to list")
-    pattern: str | None = Field(
-        default=None,
-        description="Glob pattern to filter entries (e.g., '*.py', '*.md')",
-    )
-    recursive: bool = Field(
-        default=False,
-        description="If True, list contents recursively including subdirectories",
-    )
-
-
-class ListDirTool(BaseEnvironmentTool):
-    """List contents of a directory with optional filtering.
-
-    Use this tool to:
-    - Explore project structure
-    - Find specific file types
-    - Check what files exist in a directory
-    - Navigate the file system
-    """
-
-    name: str = "list_directory"
-    description: str = """List contents of a directory.
-
-Use this to explore directories and find files. You can filter by pattern
-and optionally list recursively.
-
-Examples:
-- List current dir: path="."
-- List src folder: path="src/"
-- Find Python files: path=".", pattern="*.py"
-- Recursive listing: path="src/", recursive=True
-"""
-    args_schema: type[BaseModel] = ListDirInput
-
-    def _run(
-        self,
-        path: str = ".",
-        pattern: str | None = None,
-        recursive: bool = False,
-    ) -> str:
-        """List directory contents.
-
-        Args:
-            path: Directory path to list.
-            pattern: Glob pattern to filter entries.
-            recursive: Whether to list recursively.
-
-        Returns:
-            Formatted directory listing or error message.
-        """
-        # Validate path against allowed_paths
-        valid, result = self._validate_path(path)
-        if not valid:
-            return f"Error: {result}"
-
-        assert isinstance(result, Path)  # noqa: S101
-        dir_path = result
-
-        # Check directory exists
-        if not dir_path.exists():
-            return f"Error: Directory not found: {path}"
-
-        if not dir_path.is_dir():
-            return f"Error: Not a directory: {path}"
-
-        try:
-            # Get entries based on pattern and recursive flag
-            if pattern:
-                if recursive:
-                    entries = list(dir_path.rglob(pattern))
-                else:
-                    entries = list(dir_path.glob(pattern))
-            else:
-                if recursive:
-                    entries = list(dir_path.rglob("*"))
-                else:
-                    entries = list(dir_path.iterdir())
-
-            # Filter out hidden files (starting with .)
-            entries = [e for e in entries if not e.name.startswith(".")]
-
-            # Sort: directories first, then files, alphabetically
-            entries.sort(key=lambda x: (not x.is_dir(), x.name.lower()))
-
-            if not entries:
-                if pattern:
-                    return f"No entries matching '{pattern}' in {path}"
-                return f"Directory is empty: {path}"
-
-            # Format output
-            result_lines = [f"Contents of {path}:"]
-            result_lines.append("=" * 60)
-
-            dirs = []
-            files = []
-
-            for entry in entries:
-                # Get relative path for recursive listings
-                if recursive:
-                    display_name = str(entry.relative_to(dir_path))
-                else:
-                    display_name = entry.name
-
-                if entry.is_dir():
-                    dirs.append(f"📁 {display_name}/")
-                else:
-                    try:
-                        size = entry.stat().st_size
-                    except (OSError, PermissionError):
-                        continue  # Skip files we can't stat
-                    size_str = self._format_size(size)
-                    files.append(f"📄 {display_name} ({size_str})")
-
-            # Output directories first, then files
-            if dirs:
-                result_lines.extend(dirs)
-            if files:
-                if dirs:
-                    result_lines.append("")  # Blank line between dirs and files
-                result_lines.extend(files)
-
-            result_lines.append("")
-            result_lines.append(f"Total: {len(dirs)} directories, {len(files)} files")
-
-            return "\n".join(result_lines)
-
-        except PermissionError:
-            return f"Error: Permission denied: {path}"
-        except Exception as e:
-            return f"Error listing directory: {e}"

lib/crewai/src/crewai/tools/__init__.py

@@ -1,9 +1,12 @@
 from crewai.tools.base_tool import BaseTool, EnvVar, tool
+from crewai.tools.tool_search_tool import SearchStrategy, ToolSearchTool
 
 
 
 __all__ = [
     "BaseTool",
     "EnvVar",
+    "SearchStrategy",
+    "ToolSearchTool",
     "tool",
 ]

lib/crewai/src/crewai/tools/tool_search_tool.py

@@ -0,0 +1,333 @@
+"""Tool Search Tool for on-demand tool discovery.
+
+This module implements a Tool Search Tool that allows agents to dynamically
+discover and load tools on-demand, reducing token consumption when working
+with large tool libraries.
+
+Inspired by Anthropic's Tool Search Tool approach for on-demand tool loading.
+"""
+
+from __future__ import annotations
+
+from collections.abc import Callable, Sequence
+from enum import Enum
+import json
+import re
+from typing import Any
+
+from pydantic import BaseModel, Field
+
+from crewai.tools.base_tool import BaseTool
+from crewai.tools.structured_tool import CrewStructuredTool
+from crewai.utilities.pydantic_schema_utils import generate_model_description
+
+
+class SearchStrategy(str, Enum):
+    """Search strategy for tool discovery."""
+
+    KEYWORD = "keyword"
+    REGEX = "regex"
+
+
+class ToolSearchResult(BaseModel):
+    """Result from a tool search operation."""
+
+    name: str = Field(description="The name of the tool")
+    description: str = Field(description="The description of the tool")
+    args_schema: dict[str, Any] = Field(
+        description="The JSON schema for the tool's arguments"
+    )
+
+
+class ToolSearchToolSchema(BaseModel):
+    """Schema for the Tool Search Tool arguments."""
+
+    query: str = Field(
+        description="The search query to find relevant tools. Use keywords that describe the capability you need."
+    )
+    max_results: int = Field(
+        default=5,
+        description="Maximum number of tools to return. Default is 5.",
+        ge=1,
+        le=20,
+    )
+
+
+class ToolSearchTool(BaseTool):
+    """A tool that searches through a catalog of tools to find relevant ones.
+
+    This tool enables on-demand tool discovery, allowing agents to work with
+    large tool libraries without loading all tool definitions upfront. Instead
+    of consuming tokens with all tool definitions, the agent can search for
+    relevant tools when needed.
+
+    Example:
+        ```python
+        from crewai.tools import BaseTool, ToolSearchTool
+
+        # Create your tools
+        search_tool = MySearchTool()
+        scrape_tool = MyScrapeWebsiteTool()
+        database_tool = MyDatabaseTool()
+
+        # Create a tool search tool with your tool catalog
+        tool_search = ToolSearchTool(
+            tool_catalog=[search_tool, scrape_tool, database_tool],
+            search_strategy=SearchStrategy.KEYWORD,
+        )
+
+        # Use with an agent - only the tool_search is loaded initially
+        agent = Agent(
+            role="Researcher",
+            tools=[tool_search],  # Other tools discovered on-demand
+        )
+        ```
+
+    Attributes:
+        tool_catalog: List of tools available for search.
+        search_strategy: Strategy to use for searching (keyword or regex).
+        custom_search_fn: Optional custom search function for advanced matching.
+    """
+
+    name: str = Field(
+        default="Tool Search",
+        description="The name of the tool search tool.",
+    )
+    description: str = Field(
+        default="Search for available tools by describing the capability you need. Returns tool definitions that match your query.",
+        description="Description of what the tool search tool does.",
+    )
+    args_schema: type[BaseModel] = Field(
+        default=ToolSearchToolSchema,
+        description="The schema for the tool search arguments.",
+    )
+    tool_catalog: list[BaseTool | CrewStructuredTool] = Field(
+        default_factory=list,
+        description="List of tools available for search.",
+    )
+    search_strategy: SearchStrategy = Field(
+        default=SearchStrategy.KEYWORD,
+        description="Strategy to use for searching tools.",
+    )
+    custom_search_fn: Callable[
+        [str, Sequence[BaseTool | CrewStructuredTool]], list[BaseTool | CrewStructuredTool]
+    ] | None = Field(
+        default=None,
+        description="Optional custom search function for advanced matching.",
+    )
+
+    def _run(self, query: str, max_results: int = 5) -> str:
+        """Search for tools matching the query.
+
+        Args:
+            query: The search query to find relevant tools.
+            max_results: Maximum number of tools to return.
+
+        Returns:
+            JSON string containing the matching tool definitions.
+        """
+        if not self.tool_catalog:
+            return json.dumps(
+                {
+                    "status": "error",
+                    "message": "No tools available in the catalog.",
+                    "tools": [],
+                }
+            )
+
+        if self.custom_search_fn:
+            matching_tools = self.custom_search_fn(query, self.tool_catalog)
+        elif self.search_strategy == SearchStrategy.REGEX:
+            matching_tools = self._regex_search(query)
+        else:
+            matching_tools = self._keyword_search(query)
+
+        matching_tools = matching_tools[:max_results]
+
+        if not matching_tools:
+            return json.dumps(
+                {
+                    "status": "no_results",
+                    "message": f"No tools found matching query: '{query}'. Try different keywords.",
+                    "tools": [],
+                }
+            )
+
+        tool_results = []
+        for tool in matching_tools:
+            tool_info = self._get_tool_info(tool)
+            tool_results.append(tool_info)
+
+        return json.dumps(
+            {
+                "status": "success",
+                "message": f"Found {len(tool_results)} tool(s) matching your query.",
+                "tools": tool_results,
+            },
+            indent=2,
+        )
+
+    def _keyword_search(
+        self, query: str
+    ) -> list[BaseTool | CrewStructuredTool]:
+        """Search tools using keyword matching.
+
+        Args:
+            query: The search query.
+
+        Returns:
+            List of matching tools sorted by relevance.
+        """
+        query_lower = query.lower()
+        query_words = set(query_lower.split())
+
+        scored_tools: list[tuple[float, BaseTool | CrewStructuredTool]] = []
+
+        for tool in self.tool_catalog:
+            score = self._calculate_keyword_score(tool, query_lower, query_words)
+            if score > 0:
+                scored_tools.append((score, tool))
+
+        scored_tools.sort(key=lambda x: x[0], reverse=True)
+        return [tool for _, tool in scored_tools]
+
+    def _calculate_keyword_score(
+        self,
+        tool: BaseTool | CrewStructuredTool,
+        query_lower: str,
+        query_words: set[str],
+    ) -> float:
+        """Calculate relevance score for a tool based on keyword matching.
+
+        Args:
+            tool: The tool to score.
+            query_lower: Lowercase query string.
+            query_words: Set of query words.
+
+        Returns:
+            Relevance score (higher is better).
+        """
+        score = 0.0
+        tool_name_lower = tool.name.lower()
+        tool_desc_lower = tool.description.lower()
+
+        if query_lower in tool_name_lower:
+            score += 10.0
+        if query_lower in tool_desc_lower:
+            score += 5.0
+
+        for word in query_words:
+            if len(word) < 2:
+                continue
+            if word in tool_name_lower:
+                score += 3.0
+            if word in tool_desc_lower:
+                score += 1.0
+
+        return score
+
+    def _regex_search(
+        self, query: str
+    ) -> list[BaseTool | CrewStructuredTool]:
+        """Search tools using regex pattern matching.
+
+        Args:
+            query: The regex pattern to search for.
+
+        Returns:
+            List of matching tools.
+        """
+        try:
+            pattern = re.compile(query, re.IGNORECASE)
+        except re.error:
+            pattern = re.compile(re.escape(query), re.IGNORECASE)
+
+        return [
+            tool
+            for tool in self.tool_catalog
+            if pattern.search(tool.name) or pattern.search(tool.description)
+        ]
+
+    def _get_tool_info(self, tool: BaseTool | CrewStructuredTool) -> dict[str, Any]:
+        """Get tool information as a dictionary.
+
+        Args:
+            tool: The tool to get information from.
+
+        Returns:
+            Dictionary containing tool name, description, and args schema.
+        """
+        if isinstance(tool, BaseTool):
+            schema_dict = generate_model_description(tool.args_schema)
+            args_schema = schema_dict.get("json_schema", {}).get("schema", {})
+        else:
+            args_schema = tool.args_schema.model_json_schema()
+
+        return {
+            "name": tool.name,
+            "description": self._get_original_description(tool),
+            "args_schema": args_schema,
+        }
+
+    def _get_original_description(self, tool: BaseTool | CrewStructuredTool) -> str:
+        """Get the original description of a tool without the generated schema.
+
+        Args:
+            tool: The tool to get the description from.
+
+        Returns:
+            The original tool description.
+        """
+        description = tool.description
+        if "Tool Description:" in description:
+            parts = description.split("Tool Description:")
+            if len(parts) > 1:
+                return parts[1].strip()
+        return description
+
+    def add_tool(self, tool: BaseTool | CrewStructuredTool) -> None:
+        """Add a tool to the catalog.
+
+        Args:
+            tool: The tool to add.
+        """
+        self.tool_catalog.append(tool)
+
+    def add_tools(self, tools: Sequence[BaseTool | CrewStructuredTool]) -> None:
+        """Add multiple tools to the catalog.
+
+        Args:
+            tools: The tools to add.
+        """
+        self.tool_catalog.extend(tools)
+
+    def remove_tool(self, tool_name: str) -> bool:
+        """Remove a tool from the catalog by name.
+
+        Args:
+            tool_name: The name of the tool to remove.
+
+        Returns:
+            True if the tool was removed, False if not found.
+        """
+        for i, tool in enumerate(self.tool_catalog):
+            if tool.name == tool_name:
+                self.tool_catalog.pop(i)
+                return True
+        return False
+
+    def get_catalog_size(self) -> int:
+        """Get the number of tools in the catalog.
+
+        Returns:
+            The number of tools in the catalog.
+        """
+        return len(self.tool_catalog)
+
+    def list_tool_names(self) -> list[str]:
+        """List all tool names in the catalog.
+
+        Returns:
+            List of tool names.
+        """
+        return [tool.name for tool in self.tool_catalog]

lib/crewai/tests/experimental/environment_tools/test_environment_tools.py

@@ -1,408 +0,0 @@
-"""Tests for experimental environment tools."""
-
-from __future__ import annotations
-
-import os
-import tempfile
-from collections.abc import Generator
-from pathlib import Path
-
-import pytest
-
-from crewai.experimental.environment_tools import (
-    BaseEnvironmentTool,
-    EnvironmentTools,
-    FileReadTool,
-    FileSearchTool,
-    GrepTool,
-    ListDirTool,
-)
-
-
-# ============================================================================
-# Fixtures
-# ============================================================================
-
-
-@pytest.fixture
-def temp_dir() -> Generator[str, None, None]:
-    """Create a temporary directory with test files."""
-    with tempfile.TemporaryDirectory() as tmpdir:
-        # Create test files
-        test_file = Path(tmpdir) / "test.txt"
-        test_file.write_text("Line 1\nLine 2\nLine 3\nLine 4\nLine 5\n")
-
-        python_file = Path(tmpdir) / "example.py"
-        python_file.write_text("def hello():\n    print('Hello World')\n")
-
-        # Create subdirectory with files
-        subdir = Path(tmpdir) / "subdir"
-        subdir.mkdir()
-        (subdir / "nested.txt").write_text("Nested content\n")
-        (subdir / "another.py").write_text("# Another Python file\n")
-
-        yield tmpdir
-
-
-@pytest.fixture
-def restricted_temp_dir() -> Generator[tuple[str, str], None, None]:
-    """Create two directories - one allowed, one not."""
-    with tempfile.TemporaryDirectory() as allowed_dir:
-        with tempfile.TemporaryDirectory() as forbidden_dir:
-            # Create files in both
-            (Path(allowed_dir) / "allowed.txt").write_text("Allowed content\n")
-            (Path(forbidden_dir) / "forbidden.txt").write_text("Forbidden content\n")
-
-            yield allowed_dir, forbidden_dir
-
-
-# ============================================================================
-# BaseEnvironmentTool Tests
-# ============================================================================
-
-
-class TestBaseEnvironmentTool:
-    """Tests for BaseEnvironmentTool path validation."""
-
-    def test_default_allowed_paths_is_current_directory(self) -> None:
-        """Default allowed_paths should be current directory for security."""
-        tool = FileReadTool()
-
-        assert tool.allowed_paths == ["."]
-
-    def test_validate_path_explicit_no_restrictions(self, temp_dir: str) -> None:
-        """With explicit empty allowed_paths, all paths should be allowed."""
-        tool = FileReadTool(allowed_paths=[])
-        valid, result = tool._validate_path(temp_dir)
-
-        assert valid is True
-        assert isinstance(result, Path)
-
-    def test_validate_path_within_allowed(self, temp_dir: str) -> None:
-        """Paths within allowed_paths should be valid."""
-        tool = FileReadTool(allowed_paths=[temp_dir])
-        test_file = os.path.join(temp_dir, "test.txt")
-
-        valid, result = tool._validate_path(test_file)
-
-        assert valid is True
-        assert isinstance(result, Path)
-
-    def test_validate_path_outside_allowed(self, restricted_temp_dir: tuple[str, str]) -> None:
-        """Paths outside allowed_paths should be rejected."""
-        allowed_dir, forbidden_dir = restricted_temp_dir
-        tool = FileReadTool(allowed_paths=[allowed_dir])
-
-        forbidden_file = os.path.join(forbidden_dir, "forbidden.txt")
-        valid, result = tool._validate_path(forbidden_file)
-
-        assert valid is False
-        assert isinstance(result, str)
-        assert "outside allowed paths" in result
-
-    def test_format_size(self) -> None:
-        """Test human-readable size formatting."""
-        tool = FileReadTool()
-
-        assert tool._format_size(500) == "500B"
-        assert tool._format_size(1024) == "1.0KB"
-        assert tool._format_size(1536) == "1.5KB"
-        assert tool._format_size(1024 * 1024) == "1.0MB"
-        assert tool._format_size(1024 * 1024 * 1024) == "1.0GB"
-
-
-# ============================================================================
-# FileReadTool Tests
-# ============================================================================
-
-
-class TestFileReadTool:
-    """Tests for FileReadTool."""
-
-    def test_read_entire_file(self, temp_dir: str) -> None:
-        """Should read entire file contents."""
-        tool = FileReadTool(allowed_paths=[temp_dir])
-        test_file = os.path.join(temp_dir, "test.txt")
-
-        result = tool._run(path=test_file)
-
-        assert "Line 1" in result
-        assert "Line 2" in result
-        assert "Line 5" in result
-        assert "File:" in result  # Metadata header
-
-    def test_read_with_line_range(self, temp_dir: str) -> None:
-        """Should read specific line range."""
-        tool = FileReadTool(allowed_paths=[temp_dir])
-        test_file = os.path.join(temp_dir, "test.txt")
-
-        result = tool._run(path=test_file, start_line=2, line_count=2)
-
-        assert "Line 2" in result
-        assert "Line 3" in result
-        # Should not include lines outside range
-        assert "Line 1" not in result.split("=" * 60)[-1]  # Check content after header
-
-    def test_read_file_not_found(self, temp_dir: str) -> None:
-        """Should return error for missing file."""
-        tool = FileReadTool(allowed_paths=[temp_dir])
-        missing_file = os.path.join(temp_dir, "nonexistent.txt")
-
-        result = tool._run(path=missing_file)
-
-        assert "Error: File not found" in result
-
-    def test_read_file_path_restricted(self, restricted_temp_dir: tuple[str, str]) -> None:
-        """Should reject paths outside allowed_paths."""
-        allowed_dir, forbidden_dir = restricted_temp_dir
-        tool = FileReadTool(allowed_paths=[allowed_dir])
-
-        forbidden_file = os.path.join(forbidden_dir, "forbidden.txt")
-        result = tool._run(path=forbidden_file)
-
-        assert "Error:" in result
-        assert "outside allowed paths" in result
-
-
-# ============================================================================
-# ListDirTool Tests
-# ============================================================================
-
-
-class TestListDirTool:
-    """Tests for ListDirTool."""
-
-    def test_list_directory(self, temp_dir: str) -> None:
-        """Should list directory contents."""
-        tool = ListDirTool(allowed_paths=[temp_dir])
-
-        result = tool._run(path=temp_dir)
-
-        assert "test.txt" in result
-        assert "example.py" in result
-        assert "subdir" in result
-        assert "Total:" in result
-
-    def test_list_with_pattern(self, temp_dir: str) -> None:
-        """Should filter by pattern."""
-        tool = ListDirTool(allowed_paths=[temp_dir])
-
-        result = tool._run(path=temp_dir, pattern="*.py")
-
-        assert "example.py" in result
-        assert "test.txt" not in result
-
-    def test_list_recursive(self, temp_dir: str) -> None:
-        """Should list recursively when enabled."""
-        tool = ListDirTool(allowed_paths=[temp_dir])
-
-        result = tool._run(path=temp_dir, recursive=True)
-
-        assert "nested.txt" in result
-        assert "another.py" in result
-
-    def test_list_nonexistent_directory(self, temp_dir: str) -> None:
-        """Should return error for missing directory."""
-        tool = ListDirTool(allowed_paths=[temp_dir])
-
-        result = tool._run(path=os.path.join(temp_dir, "nonexistent"))
-
-        assert "Error: Directory not found" in result
-
-    def test_list_path_restricted(self, restricted_temp_dir: tuple[str, str]) -> None:
-        """Should reject paths outside allowed_paths."""
-        allowed_dir, forbidden_dir = restricted_temp_dir
-        tool = ListDirTool(allowed_paths=[allowed_dir])
-
-        result = tool._run(path=forbidden_dir)
-
-        assert "Error:" in result
-        assert "outside allowed paths" in result
-
-
-# ============================================================================
-# GrepTool Tests
-# ============================================================================
-
-
-class TestGrepTool:
-    """Tests for GrepTool."""
-
-    def test_grep_finds_pattern(self, temp_dir: str) -> None:
-        """Should find matching patterns."""
-        tool = GrepTool(allowed_paths=[temp_dir])
-        test_file = os.path.join(temp_dir, "test.txt")
-
-        result = tool._run(pattern="Line 2", path=test_file)
-
-        assert "Line 2" in result
-        assert "matches" in result.lower() or "found" in result.lower()
-
-    def test_grep_no_matches(self, temp_dir: str) -> None:
-        """Should report when no matches found."""
-        tool = GrepTool(allowed_paths=[temp_dir])
-        test_file = os.path.join(temp_dir, "test.txt")
-
-        result = tool._run(pattern="nonexistent pattern xyz", path=test_file)
-
-        assert "No matches found" in result
-
-    def test_grep_recursive(self, temp_dir: str) -> None:
-        """Should search recursively in directories."""
-        tool = GrepTool(allowed_paths=[temp_dir])
-
-        result = tool._run(pattern="Nested", path=temp_dir, recursive=True)
-
-        assert "Nested" in result
-
-    def test_grep_case_insensitive(self, temp_dir: str) -> None:
-        """Should support case-insensitive search."""
-        tool = GrepTool(allowed_paths=[temp_dir])
-        test_file = os.path.join(temp_dir, "test.txt")
-
-        result = tool._run(pattern="LINE", path=test_file, ignore_case=True)
-
-        assert "Line" in result or "matches" in result.lower()
-
-    def test_grep_path_restricted(self, restricted_temp_dir: tuple[str, str]) -> None:
-        """Should reject paths outside allowed_paths."""
-        allowed_dir, forbidden_dir = restricted_temp_dir
-        tool = GrepTool(allowed_paths=[allowed_dir])
-
-        result = tool._run(pattern="test", path=forbidden_dir)
-
-        assert "Error:" in result
-        assert "outside allowed paths" in result
-
-
-# ============================================================================
-# FileSearchTool Tests
-# ============================================================================
-
-
-class TestFileSearchTool:
-    """Tests for FileSearchTool."""
-
-    def test_find_files_by_pattern(self, temp_dir: str) -> None:
-        """Should find files matching pattern."""
-        tool = FileSearchTool(allowed_paths=[temp_dir])
-
-        result = tool._run(pattern="*.py", path=temp_dir)
-
-        assert "example.py" in result
-        assert "another.py" in result
-
-    def test_find_no_matches(self, temp_dir: str) -> None:
-        """Should report when no files match."""
-        tool = FileSearchTool(allowed_paths=[temp_dir])
-
-        result = tool._run(pattern="*.xyz", path=temp_dir)
-
-        assert "No" in result and "found" in result
-
-    def test_find_files_only(self, temp_dir: str) -> None:
-        """Should filter to files only."""
-        tool = FileSearchTool(allowed_paths=[temp_dir])
-
-        result = tool._run(pattern="*", path=temp_dir, file_type="file")
-
-        # Should include files
-        assert "test.txt" in result or "example.py" in result
-        # Directories should have trailing slash in output
-        # Check that subdir is not listed as a file
-
-    def test_find_dirs_only(self, temp_dir: str) -> None:
-        """Should filter to directories only."""
-        tool = FileSearchTool(allowed_paths=[temp_dir])
-
-        result = tool._run(pattern="*", path=temp_dir, file_type="dir")
-
-        assert "subdir" in result
-
-    def test_find_path_restricted(self, restricted_temp_dir: tuple[str, str]) -> None:
-        """Should reject paths outside allowed_paths."""
-        allowed_dir, forbidden_dir = restricted_temp_dir
-        tool = FileSearchTool(allowed_paths=[allowed_dir])
-
-        result = tool._run(pattern="*", path=forbidden_dir)
-
-        assert "Error:" in result
-        assert "outside allowed paths" in result
-
-
-# ============================================================================
-# EnvironmentTools Manager Tests
-# ============================================================================
-
-
-class TestEnvironmentTools:
-    """Tests for EnvironmentTools manager class."""
-
-    def test_default_allowed_paths_is_current_directory(self) -> None:
-        """Default should restrict to current directory for security."""
-        env_tools = EnvironmentTools()
-        tools = env_tools.tools()
-
-        # All tools should default to current directory
-        for tool in tools:
-            assert isinstance(tool, BaseEnvironmentTool)
-            assert tool.allowed_paths == ["."]
-
-    def test_explicit_empty_allowed_paths_allows_all(self) -> None:
-        """Passing empty list should allow all paths."""
-        env_tools = EnvironmentTools(allowed_paths=[])
-        tools = env_tools.tools()
-
-        for tool in tools:
-            assert isinstance(tool, BaseEnvironmentTool)
-            assert tool.allowed_paths == []
-
-    def test_returns_all_tools_by_default(self) -> None:
-        """Should return all four tools by default."""
-        env_tools = EnvironmentTools()
-        tools = env_tools.tools()
-
-        assert len(tools) == 4
-
-        tool_names = [t.name for t in tools]
-        assert "read_file" in tool_names
-        assert "list_directory" in tool_names
-        assert "grep_search" in tool_names
-        assert "find_files" in tool_names
-
-    def test_exclude_grep(self) -> None:
-        """Should exclude grep tool when disabled."""
-        env_tools = EnvironmentTools(include_grep=False)
-        tools = env_tools.tools()
-
-        assert len(tools) == 3
-        tool_names = [t.name for t in tools]
-        assert "grep_search" not in tool_names
-
-    def test_exclude_search(self) -> None:
-        """Should exclude search tool when disabled."""
-        env_tools = EnvironmentTools(include_search=False)
-        tools = env_tools.tools()
-
-        assert len(tools) == 3
-        tool_names = [t.name for t in tools]
-        assert "find_files" not in tool_names
-
-    def test_allowed_paths_propagated(self, temp_dir: str) -> None:
-        """Should propagate allowed_paths to all tools."""
-        env_tools = EnvironmentTools(allowed_paths=[temp_dir])
-        tools = env_tools.tools()
-
-        for tool in tools:
-            assert isinstance(tool, BaseEnvironmentTool)
-            assert tool.allowed_paths == [temp_dir]
-
-    def test_tools_are_base_tool_instances(self) -> None:
-        """All returned tools should be BaseTool instances."""
-        from crewai.tools.base_tool import BaseTool
-
-        env_tools = EnvironmentTools()
-        tools = env_tools.tools()
-
-        for tool in tools:
-            assert isinstance(tool, BaseTool)

lib/crewai/tests/tools/test_tool_search_tool.py

@@ -0,0 +1,393 @@
+"""Tests for the ToolSearchTool functionality."""
+
+import json
+
+import pytest
+from pydantic import BaseModel
+
+from crewai.tools import BaseTool, SearchStrategy, ToolSearchTool
+
+
+class MockSearchTool(BaseTool):
+    """A mock search tool for testing."""
+
+    name: str = "Web Search"
+    description: str = "Search the web for information on any topic."
+
+    def _run(self, query: str) -> str:
+        return f"Search results for: {query}"
+
+
+class MockDatabaseTool(BaseTool):
+    """A mock database tool for testing."""
+
+    name: str = "Database Query"
+    description: str = "Query a SQL database to retrieve data."
+
+    def _run(self, query: str) -> str:
+        return f"Database results for: {query}"
+
+
+class MockScrapeTool(BaseTool):
+    """A mock web scraping tool for testing."""
+
+    name: str = "Web Scraper"
+    description: str = "Scrape content from websites and extract text."
+
+    def _run(self, url: str) -> str:
+        return f"Scraped content from: {url}"
+
+
+class MockEmailTool(BaseTool):
+    """A mock email tool for testing."""
+
+    name: str = "Send Email"
+    description: str = "Send an email to a specified recipient."
+
+    def _run(self, to: str, subject: str, body: str) -> str:
+        return f"Email sent to {to}"
+
+
+class MockCalculatorTool(BaseTool):
+    """A mock calculator tool for testing."""
+
+    name: str = "Calculator"
+    description: str = "Perform mathematical calculations and arithmetic operations."
+
+    def _run(self, expression: str) -> str:
+        return f"Result: {eval(expression)}"
+
+
+@pytest.fixture
+def sample_tools() -> list[BaseTool]:
+    """Create a list of sample tools for testing."""
+    return [
+        MockSearchTool(),
+        MockDatabaseTool(),
+        MockScrapeTool(),
+        MockEmailTool(),
+        MockCalculatorTool(),
+    ]
+
+
+@pytest.fixture
+def tool_search(sample_tools: list[BaseTool]) -> ToolSearchTool:
+    """Create a ToolSearchTool with sample tools."""
+    return ToolSearchTool(tool_catalog=sample_tools)
+
+
+class TestToolSearchToolCreation:
+    """Tests for ToolSearchTool creation and initialization."""
+
+    def test_create_tool_search_with_empty_catalog(self) -> None:
+        """Test creating a ToolSearchTool with an empty catalog."""
+        tool_search = ToolSearchTool()
+        assert tool_search.name == "Tool Search"
+        assert tool_search.tool_catalog == []
+        assert tool_search.search_strategy == SearchStrategy.KEYWORD
+
+    def test_create_tool_search_with_tools(self, sample_tools: list[BaseTool]) -> None:
+        """Test creating a ToolSearchTool with a list of tools."""
+        tool_search = ToolSearchTool(tool_catalog=sample_tools)
+        assert len(tool_search.tool_catalog) == 5
+        assert tool_search.get_catalog_size() == 5
+
+    def test_create_tool_search_with_regex_strategy(
+        self, sample_tools: list[BaseTool]
+    ) -> None:
+        """Test creating a ToolSearchTool with regex search strategy."""
+        tool_search = ToolSearchTool(
+            tool_catalog=sample_tools, search_strategy=SearchStrategy.REGEX
+        )
+        assert tool_search.search_strategy == SearchStrategy.REGEX
+
+    def test_create_tool_search_with_custom_name(self) -> None:
+        """Test creating a ToolSearchTool with a custom name."""
+        tool_search = ToolSearchTool(name="My Tool Finder")
+        assert tool_search.name == "My Tool Finder"
+
+
+class TestToolSearchKeywordSearch:
+    """Tests for keyword-based tool search."""
+
+    def test_search_by_exact_name(self, tool_search: ToolSearchTool) -> None:
+        """Test searching for a tool by its exact name."""
+        result = tool_search._run("Web Search")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        assert len(result_data["tools"]) >= 1
+        assert result_data["tools"][0]["name"] == "Web Search"
+
+    def test_search_by_partial_name(self, tool_search: ToolSearchTool) -> None:
+        """Test searching for a tool by partial name."""
+        result = tool_search._run("Search")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        assert len(result_data["tools"]) >= 1
+        tool_names = [t["name"] for t in result_data["tools"]]
+        assert "Web Search" in tool_names
+
+    def test_search_by_description_keyword(self, tool_search: ToolSearchTool) -> None:
+        """Test searching for a tool by keyword in description."""
+        result = tool_search._run("database")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        assert len(result_data["tools"]) >= 1
+        tool_names = [t["name"] for t in result_data["tools"]]
+        assert "Database Query" in tool_names
+
+    def test_search_with_multiple_keywords(self, tool_search: ToolSearchTool) -> None:
+        """Test searching with multiple keywords."""
+        result = tool_search._run("web scrape content")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        assert len(result_data["tools"]) >= 1
+        tool_names = [t["name"] for t in result_data["tools"]]
+        assert "Web Scraper" in tool_names
+
+    def test_search_no_results(self, tool_search: ToolSearchTool) -> None:
+        """Test searching with a query that returns no results."""
+        result = tool_search._run("xyznonexistent123abc")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "no_results"
+        assert len(result_data["tools"]) == 0
+
+    def test_search_max_results_limit(self, tool_search: ToolSearchTool) -> None:
+        """Test that max_results limits the number of returned tools."""
+        result = tool_search._run("tool", max_results=2)
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        assert len(result_data["tools"]) <= 2
+
+    def test_search_empty_catalog(self) -> None:
+        """Test searching with an empty tool catalog."""
+        tool_search = ToolSearchTool()
+        result = tool_search._run("search")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "error"
+        assert "No tools available" in result_data["message"]
+
+
+class TestToolSearchRegexSearch:
+    """Tests for regex-based tool search."""
+
+    def test_regex_search_simple_pattern(
+        self, sample_tools: list[BaseTool]
+    ) -> None:
+        """Test regex search with a simple pattern."""
+        tool_search = ToolSearchTool(
+            tool_catalog=sample_tools, search_strategy=SearchStrategy.REGEX
+        )
+        result = tool_search._run("Web.*")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        tool_names = [t["name"] for t in result_data["tools"]]
+        assert "Web Search" in tool_names or "Web Scraper" in tool_names
+
+    def test_regex_search_case_insensitive(
+        self, sample_tools: list[BaseTool]
+    ) -> None:
+        """Test that regex search is case insensitive."""
+        tool_search = ToolSearchTool(
+            tool_catalog=sample_tools, search_strategy=SearchStrategy.REGEX
+        )
+        result = tool_search._run("email")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        tool_names = [t["name"] for t in result_data["tools"]]
+        assert "Send Email" in tool_names
+
+    def test_regex_search_invalid_pattern_fallback(
+        self, sample_tools: list[BaseTool]
+    ) -> None:
+        """Test that invalid regex patterns are escaped and still work."""
+        tool_search = ToolSearchTool(
+            tool_catalog=sample_tools, search_strategy=SearchStrategy.REGEX
+        )
+        result = tool_search._run("[invalid(regex")
+        result_data = json.loads(result)
+
+        assert result_data["status"] in ["success", "no_results"]
+
+
+class TestToolSearchCustomSearch:
+    """Tests for custom search function."""
+
+    def test_custom_search_function(self, sample_tools: list[BaseTool]) -> None:
+        """Test using a custom search function."""
+
+        def custom_search(
+            query: str, tools: list[BaseTool]
+        ) -> list[BaseTool]:
+            return [t for t in tools if "email" in t.name.lower()]
+
+        tool_search = ToolSearchTool(
+            tool_catalog=sample_tools, custom_search_fn=custom_search
+        )
+        result = tool_search._run("anything")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        assert len(result_data["tools"]) == 1
+        assert result_data["tools"][0]["name"] == "Send Email"
+
+
+class TestToolSearchCatalogManagement:
+    """Tests for tool catalog management."""
+
+    def test_add_tool(self, tool_search: ToolSearchTool) -> None:
+        """Test adding a tool to the catalog."""
+        initial_size = tool_search.get_catalog_size()
+
+        class NewTool(BaseTool):
+            name: str = "New Tool"
+            description: str = "A new tool for testing."
+
+            def _run(self) -> str:
+                return "New tool result"
+
+        tool_search.add_tool(NewTool())
+        assert tool_search.get_catalog_size() == initial_size + 1
+
+    def test_add_tools(self, tool_search: ToolSearchTool) -> None:
+        """Test adding multiple tools to the catalog."""
+        initial_size = tool_search.get_catalog_size()
+
+        class NewTool1(BaseTool):
+            name: str = "New Tool 1"
+            description: str = "First new tool."
+
+            def _run(self) -> str:
+                return "Result 1"
+
+        class NewTool2(BaseTool):
+            name: str = "New Tool 2"
+            description: str = "Second new tool."
+
+            def _run(self) -> str:
+                return "Result 2"
+
+        tool_search.add_tools([NewTool1(), NewTool2()])
+        assert tool_search.get_catalog_size() == initial_size + 2
+
+    def test_remove_tool(self, tool_search: ToolSearchTool) -> None:
+        """Test removing a tool from the catalog."""
+        initial_size = tool_search.get_catalog_size()
+        result = tool_search.remove_tool("Web Search")
+
+        assert result is True
+        assert tool_search.get_catalog_size() == initial_size - 1
+
+    def test_remove_nonexistent_tool(self, tool_search: ToolSearchTool) -> None:
+        """Test removing a tool that doesn't exist."""
+        initial_size = tool_search.get_catalog_size()
+        result = tool_search.remove_tool("Nonexistent Tool")
+
+        assert result is False
+        assert tool_search.get_catalog_size() == initial_size
+
+    def test_list_tool_names(self, tool_search: ToolSearchTool) -> None:
+        """Test listing all tool names in the catalog."""
+        names = tool_search.list_tool_names()
+
+        assert len(names) == 5
+        assert "Web Search" in names
+        assert "Database Query" in names
+        assert "Web Scraper" in names
+        assert "Send Email" in names
+        assert "Calculator" in names
+
+
+class TestToolSearchResultFormat:
+    """Tests for the format of search results."""
+
+    def test_result_contains_tool_info(self, tool_search: ToolSearchTool) -> None:
+        """Test that search results contain complete tool information."""
+        result = tool_search._run("Calculator")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        tool_info = result_data["tools"][0]
+
+        assert "name" in tool_info
+        assert "description" in tool_info
+        assert "args_schema" in tool_info
+        assert tool_info["name"] == "Calculator"
+
+    def test_result_args_schema_format(self, tool_search: ToolSearchTool) -> None:
+        """Test that args_schema is properly formatted."""
+        result = tool_search._run("Email")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        tool_info = result_data["tools"][0]
+
+        assert "args_schema" in tool_info
+        args_schema = tool_info["args_schema"]
+        assert isinstance(args_schema, dict)
+
+
+class TestToolSearchIntegration:
+    """Integration tests for ToolSearchTool."""
+
+    def test_tool_search_as_base_tool(self, sample_tools: list[BaseTool]) -> None:
+        """Test that ToolSearchTool works as a BaseTool."""
+        tool_search = ToolSearchTool(tool_catalog=sample_tools)
+
+        assert isinstance(tool_search, BaseTool)
+        assert tool_search.name == "Tool Search"
+        assert "search" in tool_search.description.lower()
+
+    def test_tool_search_to_structured_tool(
+        self, sample_tools: list[BaseTool]
+    ) -> None:
+        """Test converting ToolSearchTool to structured tool."""
+        tool_search = ToolSearchTool(tool_catalog=sample_tools)
+        structured = tool_search.to_structured_tool()
+
+        assert structured.name == "Tool Search"
+        assert structured.args_schema is not None
+
+    def test_tool_search_run_method(self, tool_search: ToolSearchTool) -> None:
+        """Test the run method of ToolSearchTool."""
+        result = tool_search.run(query="search", max_results=3)
+
+        assert isinstance(result, str)
+        result_data = json.loads(result)
+        assert "status" in result_data
+        assert "tools" in result_data
+
+
+class TestToolSearchScoring:
+    """Tests for the keyword scoring algorithm."""
+
+    def test_exact_name_match_scores_highest(
+        self, sample_tools: list[BaseTool]
+    ) -> None:
+        """Test that exact name matches score higher than partial matches."""
+        tool_search = ToolSearchTool(tool_catalog=sample_tools)
+        result = tool_search._run("Web Search")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        assert result_data["tools"][0]["name"] == "Web Search"
+
+    def test_name_match_scores_higher_than_description(
+        self, sample_tools: list[BaseTool]
+    ) -> None:
+        """Test that name matches score higher than description matches."""
+        tool_search = ToolSearchTool(tool_catalog=sample_tools)
+        result = tool_search._run("Calculator")
+        result_data = json.loads(result)
+
+        assert result_data["status"] == "success"
+        assert result_data["tools"][0]["name"] == "Calculator"