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L16 · Phase 5 · 20 min

Tools: When the Model Is Not Enough

I asked about current Portuguese regulations for this installation — and separately, I told my kitchen agent 'I used two eggs.' Neither answer came purely from what the model already knew.

A second thread runs alongside the condominium conversation: your own Kitchen Inventory Agent. You built it for yourself, separately, after one too many trips to the shop for eggs you already had and one too many mornings finding the rice jar empty with no warning. It’s small — a chat interface, a rules engine, and a layer that turns what you say into a structured update — but it actually changes real data, which the condo conversation never does. That difference is what this second thread is here to teach.

Tool-Calling Simulator

Click either button to see the tool call it triggers.

Same mechanism — the model requests help from something outside itself — but very different consequences: one only retrieves information, the other changes real data.

Depth ladder

Sometimes AI Tool doesn't answer purely from what it already knows — it asks something else for help instead. Asking about current regulations triggers a lookup; telling your kitchen agent 'I used two eggs' triggers an actual update to real data. Same mechanism, very different consequence.

Knowledge check

Given three AI Tool responses, label each as model knowledge, retrieved information, or computed/acted information.