Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true and idempotentHint=true, so the description only needs to add context beyond that. It adds usage context (stale context, sensitive data) but does not disclose additional behavioral traits like error handling or irreversibility. This is adequate given annotation coverage, but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.