ensure native tool calling works with liteagent

lib/crewai/src/crewai/agent/core.py

@@ -311,6 +311,22 @@ class Agent(BaseAgent):
 
         return any(getattr(self.crew, attr) for attr in memory_attributes)
 
+    def _supports_native_tool_calling(self, tools: list[BaseTool]) -> bool:
+        """Check if the LLM supports native function calling with the given tools.
+
+        Args:
+            tools: List of tools to check against.
+
+        Returns:
+            True if native function calling is supported and tools are available.
+        """
+        return (
+            hasattr(self.llm, "supports_function_calling")
+            and callable(getattr(self.llm, "supports_function_calling", None))
+            and self.llm.supports_function_calling()
+            and len(tools) > 0
+        )
+
     def execute_task(
         self,
         task: Task,
@@ -733,12 +749,7 @@ class Agent(BaseAgent):
         raw_tools: list[BaseTool] = tools or self.tools or []
         parsed_tools = parse_tools(raw_tools)
 
-        use_native_tool_calling = (
-            hasattr(self.llm, "supports_function_calling")
-            and callable(getattr(self.llm, "supports_function_calling", None))
-            and self.llm.supports_function_calling()
-            and len(raw_tools) > 0
-        )
+        use_native_tool_calling = self._supports_native_tool_calling(raw_tools)
 
         prompt = Prompts(
             agent=self,
@@ -751,8 +762,6 @@ class Agent(BaseAgent):
             response_template=self.response_template,
         ).task_execution()
 
-        print("prompt", prompt)
-
         stop_words = [self.i18n.slice("observation")]
 
         if self.response_template:
@@ -1644,9 +1653,11 @@ class Agent(BaseAgent):
         }
 
         # Build prompt for standalone execution
+        use_native_tool_calling = self._supports_native_tool_calling(raw_tools)
         prompt = Prompts(
             agent=self,
             has_tools=len(raw_tools) > 0,
+            use_native_tool_calling=use_native_tool_calling,
             i18n=self.i18n,
             use_system_prompt=self.use_system_prompt,
             system_template=self.system_template,
@@ -1754,7 +1765,6 @@ class Agent(BaseAgent):
             )
 
             output = self._execute_and_build_output(executor, inputs, response_format)
-
             if self.guardrail is not None:
                 output = self._process_kickoff_guardrail(
                     output=output,

lib/crewai/src/crewai/utilities/types.py

@@ -13,5 +13,5 @@ class LLMMessage(TypedDict):
           instead of str | list[dict[str, str]]
     """
 
-    role: Literal["user", "assistant", "system"]
-    content: str | list[dict[str, Any]]
+    role: Literal["user", "assistant", "system", "tool"]
+    content: str | list[dict[str, Any]] | None