Function Calling - How Does It Modify The Prompt?

[supershaneski]

here’s a reply from the openai staff about another question that might answer your question:

Calling a function when chat wants a user to clarify his question

A general rule for instructing the model whether or not to call a function is to do that in system prompt (instructions for Assistant), whereas description in the function definition is better suited to tell the model how to call the function.