Function Calling: Teaching Tools to the Assistant

Fri, 15 May 2026 00:06:00 -0400

This post is part of the Voice Assistant on Raspberry Pi series.

In article #5, we injected weather data into every conversation, even for questions like “what’s your name?”. That wastes tokens. Function calling fixes this: the LLM decides when it needs a tool and only calls it when the question actually warrants it.

The complete code for this article is available on GitHub.

Function Calling on Gabriel Mongeon

Function Calling: Teaching Tools to the Assistant