refactor: Simplify tool handling in agent adapters

- Changed default value of `tools` parameter in LangGraphAgentAdapter to None for better handling of empty tool lists.
- Updated tool initialization in both LangGraphAgentAdapter and OpenAIAgentAdapter to directly pass the `tools` parameter, removing unnecessary list handling.
- Cleaned up commented-out code in OpenAIConverterAdapter to improve readability.

src/crewai/agents/agent_adapters/langgraph/langgraph_adapter.py

@@ -52,7 +52,7 @@ class LangGraphAgentAdapter(BaseAgentAdapter):
         role: str,
         goal: str,
         backstory: str,
-        tools: Optional[List[BaseTool]] = [],
+        tools: Optional[List[BaseTool]] = None,
         llm: Any = None,
         max_iterations: int = 10,
         agent_config: Optional[Dict[str, Any]] = None,
@@ -72,8 +72,7 @@ class LangGraphAgentAdapter(BaseAgentAdapter):
             agent_config=agent_config,
             **kwargs,
         )
-        self.tools = tools or []
-        self._tool_adapter = LangGraphToolAdapter(tools=tools or [])
+        self._tool_adapter = LangGraphToolAdapter(tools=tools)
         self._converter_adapter = LangGraphConverterAdapter(self)
         self._max_iterations = max_iterations
         self._setup_graph()
@@ -87,7 +86,7 @@ class LangGraphAgentAdapter(BaseAgentAdapter):
             if self._agent_config:
                 self._graph = create_react_agent(
                     model=self.llm,
-                    tools=converted_tools or [],
+                    tools=converted_tools,
                     checkpointer=self._memory,
                     debug=self.verbose,
                     **self._agent_config,

src/crewai/agents/agent_adapters/openai_agents/openai_adapter.py

@@ -60,11 +60,10 @@ class OpenAIAgentAdapter(BaseAgentAdapter):
                 role=role,
                 goal=goal,
                 backstory=backstory,
+                tools=tools,
                 agent_config=agent_config,
                 **kwargs,
             )
-
-            self.tools = tools
             self._tool_adapter = OpenAIAgentToolAdapter(tools=tools)
             self.llm = model
             self._converter_adapter = OpenAIConverterAdapter(self)

src/crewai/agents/agent_adapters/openai_agents/structured_output_converter.py

@@ -73,13 +73,6 @@ class OpenAIConverterAdapter(BaseConverterAdapter):
             .format(output_format=self._schema)
         )
 
-        # output_instructions = f"""
-        # Your response MUST conform to the following {self._output_format.upper()} schema:
-        # {self._schema}
-
-        # Ensure your final response is properly formatted according to this schema.
-        # """
-        # print("output_schema", output_schema)
         return f"{base_prompt}\n\n{output_schema}"
 
     def post_process_result(self, result: str) -> str:
@@ -96,7 +89,6 @@ class OpenAIConverterAdapter(BaseConverterAdapter):
         """
         if not self._output_format:
             return result
-        print("openai converter adapter result", result)
         # Try to extract valid JSON if it's wrapped in code blocks or other text
         if isinstance(result, str) and self._output_format in ["json", "pydantic"]:
             # First, try to parse as is