Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds rich behavioral details beyond the annotations: permanence, immediate effect, slug being freed, and safe no-op for already-deleted pages. These specifics are not covered by readOnlyHint=false or destructiveHint=true, significantly enhancing transparency.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.