Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already provide readOnly, openWorld, idempotent, and non-destructive hints, so the description's additional claim of returning a single sentence adds minimal behavioral insight. However, it does not disclose error behavior or quality criteria.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.