Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare this as a safe read/idempotent operation, and the description adds meaningful behavioral context: daily aggregation, the included metrics (min, max, average, p95), and the suggested zoom-in workflow with hourly stats. It does not discuss pagination, but the output schema and parameter descriptions partially cover operational details.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.