Update Function Choice Behavior for a chat completion function

[Allen Pan (HuskyDanny)]

Hi SK Team,

I added the function with the req setting and prompt template as default:

Now I want to update the req_setting when calling to this:

What I have tried it to pass in the arguments for kernel.invoke

But the result is weird, the included function is executed but the qa_with_context chat completion function itself is only returning empty string, Is there something wrong? Things works fine with the default, but I want the plug in to always get invoked so I update to the new one.
Here is the debug snapshot of the returned response

here is the request snapshot:

[Evan Mattson (moonbox3)]

Hi Allen Pan (@HuskyDanny), I am looking into this further and I am running the following Python sample:

https://github.com/microsoft/semantic-kernel/blob/main/python/samples/concepts/auto_function_calling/function_calling_with_required_type.py

The FunctionChoiceBehavior settings have the type set as Required. As we covered, this means the model will call one of the advertised tools. Once the function_choice_behavior.maximum_auto_invoke_attempts are hit, we get into the following code:

semantic-kernel/python/semantic_kernel/connectors/ai/chat_completion_client_base.py

Line 171 in 7579b24

# Do a final call, without function calling when the max has been reached.

This code clears the advertised tools and tool choice so that the model, using its Chat History, can respond with a final answer. In the sample code I linked to above, the maximum_auto_invoke_attempts are configured as 1. The model can request to run one or both of the advertised tools, we then run those functions in SK, and provide the results back to the model to form its final answer.