Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnly, idempotent, non-destructive and closed-world, so the safety profile needs no repetition. The description earns credit for disclosing the return shape (text with title, URL, date), which is valuable since there is no output schema. It omits auth/permission requirements, which is a minor gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.