fix(langchain): fix agent exector support tool message artifact and content

libs/langchain/langchain/agents/agent.py

@@ -1428,11 +1428,19 @@ def _perform_agent_action(
             if return_direct:
                 tool_run_kwargs["llm_prefix"] = ""
             # We then call the tool on the tool input to get an observation
+            # Get tool_call_id if exists for content_and_artifact
+            tool_call_id = (
+                agent_action.tool_call_id
+                if hasattr(agent_action, "tool_call_id")
+                else None
+            )
+
             observation = tool.run(
                 agent_action.tool_input,
                 verbose=self.verbose,
                 color=color,
                 callbacks=run_manager.get_child() if run_manager else None,
+                tool_call_id=tool_call_id,
                 **tool_run_kwargs,
             )
         else:

libs/langchain/langchain/agents/format_scratchpad/tools.py

@@ -33,6 +33,10 @@ def _create_tool_message(
     """
     if not isinstance(observation, str):
         try:
+            # if observation is already a ToolMessage, just update name and return it
+            if isinstance(observation, ToolMessage):
+                observation.additional_kwargs["name"] = agent_action.tool
+                return observation
             content = json.dumps(observation, ensure_ascii=False)
         except TypeError:
             content = str(observation)