Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, destructiveHint=false, idempotentHint=true, providing safety profile. The description adds no additional behavioral context beyond what annotations provide. It does not disclose return format, pagination, or what 'ranking data' entails.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.