Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations carry the safety profile (destructive=true, idempotent=true, readOnly=false), and the description adds genuinely new behavior: the delete is reversible via a deleted-adventures list restorable from the UI, contained pages are tombstoned alongside it, and authorization is enforced by role with a 404 for contributors.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.