Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, openWorldHint=true and destructiveHint=false, so the safety profile is covered. The description adds the useful behavioral signal that the data is 'live' status and enumerates what is returned, but says nothing about freshness/refresh cadence, auth scope, or failure behavior for a closed/invalid location.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.