Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint: true, lowering the bar. The description adds valuable context beyond annotations by explaining the API naming ('teams') and the endpoint (GET /team), which clarifies the source and mapping of the returned IDs. 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.