Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Adds rich behavioral context beyond annotations: nothing is erased, history is retained, add_project restores the same project, open actions stay, no scheduled audits run until restored, and returns projectId/domain/removed. Annotations already mark it destructive and idempotent, but the description explains the exact nature of both.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.