Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false, so the read-only, non-destructive behavior is covered. The description adds little beyond the purpose; it does not disclose additional traits like pagination, ordering, or required context beyond the client identifier. No contradiction 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.