Module 07 Summary

What this module established

A tool's docstring and schema are the model's interface to it - write them for the model, and put the guarantees in validation. The description shapes which tool gets chosen; the validation decides what happens when it is chosen wrongly.

Carry forward

• Enforce the registry and put real tool names in every rejection. A high invention rate means the goal exceeds the tools.
• Bound steps, tokens, time and repeated calls. The repeat detector usually fires first and saves the most.
• Log arguments, not just tool names. Near-duplicate arguments across consecutive calls mean retrying, not progressing.
• Tools do not imply an agent. Use a chain unless the sequence depends on run-time results.

Before moving on

Move on when every refusal branch has a direct test, all four stopping conditions exist, and you have found one wasted call from argument logs.

Mark complete