Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It adds non-obvious traits: 'Local, no LLM' (no external calls) and 'Caps depth/size' (safety limits), which are helpful for an agent. However, it remains vague about the exact nature of the caps and doesn't mention error behavior or return format.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.