Update src/txagent/txagent.py

src/txagent/txagent.py

@@ -827,7 +827,11 @@ Generate **one summarized sentence** about "function calls' responses" with nece
                     if special_tool_call == 'Finish':
                         next_round = False
                         conversation.extend(function_call_messages)
-                        return function_call_messages[0]['content']
+                        if function_call_messages and len(function_call_messages) > 0:
+                            return function_call_messages[0]['content']
+                        else:
+                            print("[⚠️ Warning] function_call_messages is empty")
+                            return "An internal reasoning error occurred — no tool response was returned."
                     elif special_tool_call == 'RequireClarification' or special_tool_call == 'DirectResponse':
                         history.append(
                             ChatMessage(role="assistant", content=history[-1].content))
@@ -872,7 +876,7 @@ Generate **one summarized sentence** about "function calls' responses" with nece
                 if '[FinalAnswer]' in last_thought:
                     _, final_answer = last_thought.split('[FinalAnswer]', 1)
                     history.append(
-                        ChatMessage(role="assistant", content="**🧠 Final Analysis**\n\n" + final_answer.strip())
+                        ChatMessage(role="assistant", content=final_answer.strip())
                     )
                     yield history
                     return
@@ -893,7 +897,7 @@ Generate **one summarized sentence** about "function calls' responses" with nece
                     if '[FinalAnswer]' in last_thought:
                         _, final_answer = last_thought.split('[FinalAnswer]', 1)
                         history.append(
-                            ChatMessage(role="assistant", content="**🧠 Final Analysis**\n\n" + final_answer.strip())
+                            ChatMessage(role="assistant", content=final_answer.strip())
                         )
                         yield history
                 else:
@@ -916,9 +920,8 @@ Generate **one summarized sentence** about "function calls' responses" with nece
                     else:
                         final_answer = last_thought
                     history.append(
-                        ChatMessage(role="assistant", content="**🧠 Final Analysis**\n\n" + final_answer.strip())
+                        ChatMessage(role="assistant", content=final_answer.strip())
                     )
                     yield history
             else:
                 return None
-