Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden and does meaningful work: it states the output is concise, names included content (official URLs, scope limits), and explicitly excludes legal-compliance verdicts. This goes beyond the schema, though it does not discuss errors, authentication, or side effects.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.