Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate this is a safe, read-only, idempotent operation. The description adds practical behavior beyond that: it returns a content bundle with problem, solution, KPIs, failure modes, and lessons, which helps the agent set expectations. It does not disclose edge-case behavior, but the annotation stack covers the critical safety profile.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.