Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint and openWorldHint, so the safety profile is covered. The description restates the return fields, which the output schema already exposes, so it adds little behavioral context beyond noting the result is a list of stories. No pagination, ordering, or result-count behavior is disclosed.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.