diff --git a/metagpt/roles/sk_agent.py b/metagpt/roles/sk_agent.py
index bb923caf2..15b18dd3e 100644
--- a/metagpt/roles/sk_agent.py
+++ b/metagpt/roles/sk_agent.py
@@ -4,9 +4,8 @@
 @Time    : 2023/9/13 12:23
 @Author  : femto Zheng
 @File    : sk_agent.py
-@Modified By: mashenquan, 2023-11-1. In accordance with Chapter 2.2.1 and 2.2.2 of RFC 116, modify the data
-        type of the `cause_by` value in the `Message` to a string, and utilize the new message distribution
-        feature for message filtering.
+@Modified By: mashenquan, 2023-11-1. In accordance with Chapter 2.2.1 and 2.2.2 of RFC 116, utilize the new message
+        distribution feature for message filtering.
 """
 from semantic_kernel.planning import SequentialPlanner
 from semantic_kernel.planning.action_planner.action_planner import ActionPlanner
@@ -17,7 +16,6 @@ from metagpt.actions.execute_task import ExecuteTask
 from metagpt.logs import logger
 from metagpt.roles import Role
 from metagpt.schema import Message
-from metagpt.utils.common import any_to_str
 from metagpt.utils.make_sk_kernel import make_sk_kernel
 
 
@@ -74,7 +72,7 @@ class SkAgent(Role):
             result = (await self.plan.invoke_async()).result
         logger.info(result)
 
-        msg = Message(content=result, role=self.profile, cause_by=any_to_str(self._rc.todo))
+        msg = Message(content=result, role=self.profile, cause_by=self._rc.todo)
         self._rc.memory.add(msg)
         self.publish_message(msg)
         return msg