Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, and the description adds the 'free top 100' scope and notes the returned fields (name, domain, category, risk score + band). This provides some context beyond annotations, but does not disclose other behaviors like pagination or rate limits. It adds moderate value without contradiction.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.