Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden. It mentions fetching 'latest state' which implies read-only behavior, but doesn't disclose important behavioral traits like whether this requires authentication, rate limits, error conditions, response format, or if it's a real-time query versus cached data.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.