Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, destructiveHint=true, idempotentHint=false, and openWorldHint=true. The description adds no behavioral context beyond these hints—it does not mention the destructive nature, idempotency, required permissions, side effects, or what happens if a user is already a member. It does not contradict the annotations, but it fails to add any value.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.