fix tool calling issue (#1467)

* fix tool calling issue

* Update tool type check

* Drop print

src/crewai/agent.py

@@ -394,7 +394,7 @@ class Agent(BaseAgent):
         """
         tool_strings = []
         for tool in tools:
-            args_schema = str(tool.args)
+            args_schema = str(tool.model_fields)
             if hasattr(tool, "func") and tool.func:
                 sig = signature(tool.func)
                 description = (

src/crewai/agents/crew_agent_executor.py

@@ -2,6 +2,7 @@ import json
 import re
 from typing import Any, Dict, List, Union
 
+from crewai.agents.agent_builder.base_agent import BaseAgent
 from crewai.agents.agent_builder.base_agent_executor_mixin import CrewAgentExecutorMixin
 from crewai.agents.parser import (
     FINAL_ANSWER_AND_PARSABLE_ACTION_ERROR_MESSAGE,
@@ -19,7 +20,6 @@ from crewai.utilities.exceptions.context_window_exceeding_exception import (
 )
 from crewai.utilities.logger import Logger
 from crewai.utilities.training_handler import CrewTrainingHandler
-from crewai.agents.agent_builder.base_agent import BaseAgent
 
 
 class CrewAgentExecutor(CrewAgentExecutorMixin):
@@ -323,9 +323,9 @@ class CrewAgentExecutor(CrewAgentExecutorMixin):
             if self.crew is not None and hasattr(self.crew, "_train_iteration"):
                 train_iteration = self.crew._train_iteration
                 if agent_id in training_data and isinstance(train_iteration, int):
-                    training_data[agent_id][train_iteration]["improved_output"] = (
-                        result.output
-                    )
+                    training_data[agent_id][train_iteration][
+                        "improved_output"
+                    ] = result.output
                     training_handler.save(training_data)
                 else:
                     self._logger.log(

src/crewai/tools/tool_usage.py

@@ -6,14 +6,13 @@ from difflib import SequenceMatcher
 from textwrap import dedent
 from typing import Any, List, Union
 
+import crewai.utilities.events as events
 from crewai.agents.tools_handler import ToolsHandler
 from crewai.task import Task
 from crewai.telemetry import Telemetry
 from crewai.tools.tool_calling import InstructorToolCalling, ToolCalling
 from crewai.tools.tool_usage_events import ToolUsageError, ToolUsageFinished
 from crewai.utilities import I18N, Converter, ConverterError, Printer
-import crewai.utilities.events as events
-
 
 agentops = None
 if os.environ.get("AGENTOPS_API_KEY"):
@@ -300,8 +299,11 @@ class ToolUsage:
         descriptions = []
         for tool in self.tools:
             args = {
-                k: {k2: v2 for k2, v2 in v.items() if k2 in ["description", "type"]}
-                for k, v in tool.args.items()
+                name: {
+                    "description": field.description,
+                    "type": field.annotation.__name__,
+                }
+                for name, field in tool.args_schema.model_fields.items()
             }
             descriptions.append(
                 "\n".join(