Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden. It communicates that the tool returns live status and has a regulatory angle, but it does not disclose that it returns incident lists, data freshness, or absence of side effects. The schema adds some context, but the description itself adds minimal behavioral detail.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.