Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, and the description's 'Fetch' is consistent with those. The description adds that the response is the 'full payload' and that it covers either snapshot kind, but it does not add deeper behavioral context such as authorization needs, snapshot lifecycle constraints, or return format caveats.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.