Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond annotations (readOnlyHint=false, idempotentHint=true, destructiveHint=false), the description adds that it is self-service, explaining the user can only affect their own membership. It also clarifies the impact on OIDC claims. No contradictions with annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.