Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare destructiveHint=true, idempotentHint=true, and readOnlyHint=false, so the safety profile is covered. The description adds no behavioral context whatsoever — not what cascades on deletion (e.g. associated metric samples), whether the deletion is soft or hard, or what permissions are required — so it neither contradicts nor enriches the annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.