Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, which is strong. The description adds the phrase 'drilldown' which implies a more detailed or expanded view beyond a simple aggregate, but doesn't add specific behavioral traits such as pagination, data freshness, or limitations beyond annotations.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.