diff --git a/autogen/agentchat/conversable_agent.py b/autogen/agentchat/conversable_agent.py
index c3394a96b..aeea27cff 100644
--- a/autogen/agentchat/conversable_agent.py
+++ b/autogen/agentchat/conversable_agent.py
@@ -242,7 +242,7 @@ class ConversableAgent(LLMAgent):
 
         # Registered hooks are kept in lists, indexed by hookable method, to be called in their order of registration.
         # New hookable methods should be added to this list as required to support new agent capabilities.
-        self.hook_lists = {
+        self.hook_lists: Dict[str, List[Callable]] = {
             "process_last_received_message": [],
             "process_all_messages_before_reply": [],
             "process_message_before_send": [],
@@ -2724,7 +2724,7 @@ class ConversableAgent(LLMAgent):
             processed_messages = hook(processed_messages)
         return processed_messages
 
-    def process_last_received_message(self, messages):
+    def process_last_received_message(self, messages: List[Dict]) -> List[Dict]:
         """
         Calls any registered capability hooks to use and potentially modify the text of the last message,
         as long as the last message is not a function call or exit command.
@@ -2758,6 +2758,7 @@ class ConversableAgent(LLMAgent):
         processed_user_content = user_content
         for hook in hook_list:
             processed_user_content = hook(processed_user_content)
+
         if processed_user_content == user_content:
             return messages  # No hooks actually modified the user's message.