Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden and mostly does not. It does disclose the backing API (Git tree API), implying a live GitHub call and suggesting truncation via 'bounded', but it never explains what 'bounded' means (depth cap, result cap, truncated flag), whether authentication is required, or what is returned. Return shape is undisclosed and there is no output schema to compensate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.