How should enforce governance in calling custom function in Autogen

[hariumeshuk]

Hello,
May be the question is already being answered somewhere. As a beginner in the autogen i would need to clarify certain topic related to the governance in the autogen.

if i have registered a custom function(python function) in the agent, how should decide calling this function based on certain criteria/parameters

for eg:
i have a function

get_weather() --> to return the weather if user query related to weather . then only the agent should call the registered function.
if query related to something else, then it should not call the function so that it make sure certain governance are enforced.

however as i tried applying this logic in the system message(inside AssistantAgent), its not working as expected and agent still calling the registered function.
so instead of asking - " what is weather in France", the query i asked "hi how are you", but the chat still responded with the weather of france

below is the complete code

def get_weather(city: str) -> str:
    return f"The weather in {city} is sunny. This is the result from the Tool"


def get_weather_data_agent(location : str):
  agent = AssistantAgent(
    name = "Weather_Agent",
     system_message=f"You are a helpful assistant that can get the weather of given city. if {location} not related to weather then say the unknown question and do not call the registered function",
    llm_config=llm_config,
  )

  user = UserProxyAgent(
    name="User",
    human_input_mode="NEVER",
    code_execution_config=False
  )

  register_function(
    get_weather,
    caller=agent,
    executor=user,
    name="get_weather",
    description="Waeather tool"
    
  )

  chat_result = user.initiate_chat(
    agent,
    message=location,
    silent=True,
    clear_history=True
    
  )


response = get_weather_data_agent(f"Hi How are you")