Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, openWorldHint, indicating safe, deterministic behavior. The description adds value by specifying data sources and the async parameter to avoid timeouts. No contradictions with annotations; however, it does not discuss error handling or data freshness limits.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.