how can I pass multiple parameters to my custom function in tools

[yangzan66]

I want to pass multiple parameters to tools(to my custom function get_cluster_change_history), so I pass a dict which include multiple keys,
I define a object parameter in tools,pass a dict to the get_cluster_change_history,but it report error:
ValueError: Unsupported tool type: <class 'dict'>

how can I pass multiple parameters to my custom function, or pass a dict param to my custom function?
thank you

async def get_cluster_change_history(param_dic: dict):
	xxx

--

api_agent = AssistantAgent(
            name="api_agent",
            model_client=OpenAIChatCompletionClient(
                model="qwen2.5:14b",
                base_url="http://localhost:11434/v1",
                api_key="placeholder", 
                model_info={
                    "function_calling": True,
                    "json_output": False,
                    "vision": False,
                    "family": ModelFamily.R1,
                }
            ),
            tools=[
                {
                    "type": "function",
                    "function": {
                        "name": "get_cluster_change_history",
                        "description": "xxx",
                        "parameters": {
                            "type": "object",
                            "properties": {
                                "param_dic": {
                                    "type": "object",
                                    "description": "xxx",
                                    "properties":{
                                        "cluster_name":{"type":"string"},
                                        "start_time":{"type":"string"}

        },
                                },

                            },
                            "required": [
                                "param_dic",

                            ]
                        }
                    }
                },


            ],  
        )

File "/Users/anaconda3/envs/py312/lib/python3.12/site-packages/autogen_agentchat/agents/_assistant_agent.py", line 323, in init
raise ValueError(f"Unsupported tool type: {type(tool)}")
ValueError: Unsupported tool type: <class 'dict'>

[ekzhu]

Please read the documentation for how to use tools with AssistantAgent: https://microsoft.github.io/autogen/stable/user-guide/agentchat-user-guide/tutorial/agents.html#assistant-agent. The tool schema is automatically generated by AutoGen -- you don't need to supply it.

It is not recommended to use dictionaries as tool parameters, because there is no way for us to automatically generate the tool schema from a dictionary.