diff --git a/python/packages/autogen-agentchat/src/autogen_agentchat/agents/_assistant_agent.py b/python/packages/autogen-agentchat/src/autogen_agentchat/agents/_assistant_agent.py
index de2087382254..099b4bdb6082 100644
--- a/python/packages/autogen-agentchat/src/autogen_agentchat/agents/_assistant_agent.py
+++ b/python/packages/autogen-agentchat/src/autogen_agentchat/agents/_assistant_agent.py
@@ -182,24 +182,7 @@ def __init__(
         else:
             self._system_messages = [SystemMessage(content=system_message)]
         self._tools: List[Tool] = []
-        if tools is not None:
-            if model_client.capabilities["function_calling"] is False:
-                raise ValueError("The model does not support function calling.")
-            for tool in tools:
-                if isinstance(tool, Tool):
-                    self._tools.append(tool)
-                elif callable(tool):
-                    if hasattr(tool, "__doc__") and tool.__doc__ is not None:
-                        description = tool.__doc__
-                    else:
-                        description = ""
-                    self._tools.append(FunctionTool(tool, description=description))
-                else:
-                    raise ValueError(f"Unsupported tool type: {type(tool)}")
-        # Check if tool names are unique.
-        tool_names = [tool.name for tool in self._tools]
-        if len(tool_names) != len(set(tool_names)):
-            raise ValueError(f"Tool names must be unique: {tool_names}")
+        self._model_context: List[LLMMessage] = []
         # Handoff tools.
         self._handoff_tools: List[Tool] = []
         self._handoffs: Dict[str, HandoffBase] = {}
@@ -214,6 +197,27 @@ def __init__(
                     self._handoffs[handoff.name] = handoff
                 else:
                     raise ValueError(f"Unsupported handoff type: {type(handoff)}")
+        if tools is not None:
+            self.add_tools(tools)
+
+    def add_tools(self, tools: List[Tool | Callable[..., Any] | Callable[..., Awaitable[Any]]]) -> None:
+        if self._model_client.capabilities["function_calling"] is False:
+            raise ValueError("The model does not support function calling.")
+        for tool in tools:
+            if isinstance(tool, Tool):
+                self._tools.append(tool)
+            elif callable(tool):
+                if hasattr(tool, "__doc__") and tool.__doc__ is not None:
+                    description = tool.__doc__
+                else:
+                    description = ""
+                self._tools.append(FunctionTool(tool, description=description))
+            else:
+                raise ValueError(f"Unsupported tool type: {type(tool)}")
+        # Check if tool names are unique.
+        tool_names = [tool.name for tool in self._tools]
+        if len(tool_names) != len(set(tool_names)):
+            raise ValueError(f"Tool names must be unique: {tool_names}")
         # Check if handoff tool names are unique.
         handoff_tool_names = [tool.name for tool in self._handoff_tools]
         if len(handoff_tool_names) != len(set(handoff_tool_names)):
@@ -223,7 +227,26 @@ def __init__(
             raise ValueError(
                 f"Handoff names must be unique from tool names. Handoff names: {handoff_tool_names}; tool names: {tool_names}"
             )
-        self._model_context: List[LLMMessage] = []
+
+    def remove_all_tools(self) -> None:
+        """Remove all tools."""
+        self._tools = []
+
+    def remove_tools(self, tool_names: List[str]) -> None:
+        """Remove tools by name."""
+        for name in tool_names:
+            for tool in self._tools:
+                if tool.name == name:
+                    self._tools.remove(tool)
+                    break
+            for tool in self._handoff_tools:
+                if tool.name == name:
+                    self._handoff_tools.remove(tool)
+                    break
+            for handoff in self._handoffs.values():
+                if handoff.name == name:
+                    self._handoffs.pop(handoff.name)
+                    break
 
     @property
     def produced_message_types(self) -> List[type[ChatMessage]]: