Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructive=true, idempotent=false, openWorld=true, so the safety profile is covered. The description adds real behavioral context beyond that: the deprecation status, why the alternative exists, and the concrete failure mode that a repeated deletion returns 404.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.