Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already indicate read-only, open-world, and idempotent behavior. The description adds that the output includes data sources and warnings, which is useful but does not disclose detailed behavioral traits (e.g., data freshness, handling of missing data, or rate limits).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.