Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint and destructiveHint=false, so the safety profile is structured data. The description still adds useful context beyond that: it needs no API key and reports server metadata rather than market data, which is a real disclosure. The only missing piece is what the status payload looks like, which the output schema covers.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.