diff --git a/metagpt/actions/talk_action.py b/metagpt/actions/talk_action.py
index ac395e9dd..4eed0d4f8 100644
--- a/metagpt/actions/talk_action.py
+++ b/metagpt/actions/talk_action.py
@@ -27,7 +27,14 @@ class TalkAction(Action):
 
     @property
     def prompt(self):
-        prompt = f"Background knowledge:\n{self._knowledge}\n\n" if self._knowledge else ""
+        prompt = ""
+        if CONFIG.agent_description:
+            prompt = (
+                f"You are {CONFIG.agent_description}. Your responses should align with the role-play agreement, "
+                f"maintaining the character's persona and habits. When faced with unrelated questions, playfully "
+                f"decline to answer without revealing your AI nature to preserve the character's image.\n\n"
+            )
+        prompt += f"Background knowledge:\n{self._knowledge}\n\n" if self._knowledge else ""
         prompt += f"{self._history_summary}\n\n"
         if self._history_summary != "":
             prompt += "According to the historical conversation above, "
diff --git a/metagpt/roles/assistant.py b/metagpt/roles/assistant.py
index 48aff319b..fdd697b59 100644
--- a/metagpt/roles/assistant.py
+++ b/metagpt/roles/assistant.py
@@ -54,14 +54,7 @@ class Assistant(Role):
         last_talk = await self.refine_memory()
         if not last_talk:
             return False
-        prompt = ""
-        if CONFIG.agent_description:
-            prompt = (
-                f"You are {CONFIG.agent_description}. Your responses should align with the role-play agreement, "
-                f"maintaining the character's persona and habits. When faced with unrelated questions, playfully "
-                f"decline to answer without revealing your AI nature to preserve the character's image.\n\n"
-            )
-        prompt += f"Refer to this sentence:\n {last_talk}\n"
+        prompt = f"Refer to this sentence:\n {last_talk}\n"
         skills = self.skills.get_skill_list()
         for desc, name in skills.items():
             prompt += f"If want you to do {desc}, return `[SKILL]: {name}` brief and clear. For instance: [SKILL]: text_to_image\n"