fix: allow CrewStructuredTool to be used with Task's tools parameter

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

src/crewai/task.py

@@ -40,6 +40,7 @@ from crewai.tasks.guardrail_result import GuardrailResult
 from crewai.tasks.output_format import OutputFormat
 from crewai.tasks.task_output import TaskOutput
 from crewai.tools.base_tool import BaseTool
+from crewai.tools.structured_tool import CrewStructuredTool
 from crewai.utilities.config import process_config
 from crewai.utilities.converter import Converter, convert_to_model
 from crewai.utilities.events import (
@@ -72,7 +73,11 @@ class Task(BaseModel):
         security_config: Security configuration including fingerprinting.
         tools: List of tools/resources limited for task execution.
     """
-
+    
+    model_config = {
+        "arbitrary_types_allowed": True,
+    }
+    
     __hash__ = object.__hash__  # type: ignore
     logger: ClassVar[logging.Logger] = logging.getLogger(__name__)
     used_tools: int = 0
@@ -118,7 +123,7 @@ class Task(BaseModel):
     output: Optional[TaskOutput] = Field(
         description="Task output, it's final result after being executed", default=None
     )
-    tools: Optional[List[BaseTool]] = Field(
+    tools: Optional[List[Union[BaseTool, CrewStructuredTool]]] = Field(
         default_factory=list,
         description="Tools the agent is limited to use for this task.",
     )

src/crewai/utilities/agent_utils.py

@@ -21,15 +21,17 @@ from crewai.utilities.exceptions.context_window_exceeding_exception import (
 )
 
 
-def parse_tools(tools: List[BaseTool]) -> List[CrewStructuredTool]:
+def parse_tools(tools: List[Union[BaseTool, CrewStructuredTool]]) -> List[CrewStructuredTool]:
     """Parse tools to be used for the task."""
     tools_list = []
 
     for tool in tools:
         if isinstance(tool, CrewAITool):
             tools_list.append(tool.to_structured_tool())
+        elif isinstance(tool, CrewStructuredTool):
+            tools_list.append(tool)
         else:
-            raise ValueError("Tool is not a CrewStructuredTool or BaseTool")
+            raise ValueError("Tool must be an instance of BaseTool or CrewStructuredTool")
 
     return tools_list
 

tests/tools/test_task_with_structured_tool.py

@@ -0,0 +1,62 @@
+import pytest
+from pydantic import BaseModel, Field
+
+from crewai.task import Task
+from crewai.tools.structured_tool import CrewStructuredTool
+
+
+@pytest.fixture
+def simple_tool_function():
+    def test_func(param1: str, param2: int = 0) -> str:
+        """Test function with basic params."""
+        return f"{param1} {param2}"
+
+    return test_func
+
+
+def test_task_with_structured_tool(simple_tool_function):
+    """Test that CrewStructuredTool can be used directly with Task."""
+    tool = CrewStructuredTool.from_function(
+        func=simple_tool_function,
+        name="test_tool",
+        description="Test tool description"
+    )
+    
+    task = Task(
+        description="Test task description",
+        expected_output="Expected output",
+        tools=[tool]
+    )
+    
+    assert len(task.tools) == 1
+    assert task.tools[0] == tool
+
+
+def test_mixed_tool_types(simple_tool_function):
+    """Test that both BaseTool and CrewStructuredTool can be used together with Task."""
+    from crewai.tools import BaseTool
+    
+    structured_tool = CrewStructuredTool.from_function(
+        func=simple_tool_function,
+        name="structured_tool",
+        description="Structured tool description"
+    )
+    
+    class TestBaseTool(BaseTool):
+        name: str = "base_tool"
+        description: str = "Base tool description"
+        
+        def _run(self, query: str) -> str:
+            return f"Result for {query}"
+    
+    base_tool = TestBaseTool()
+    
+    task = Task(
+        description="Test task description",
+        expected_output="Expected output",
+        tools=[structured_tool, base_tool]
+    )
+    
+    assert len(task.tools) == 2
+    assert task.tools[0] == structured_tool
+    assert isinstance(task.tools[1], BaseTool)