Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so the safety profile is covered. The description adds only the 'online' qualifier, suggesting active/available ads, but does not disclose pagination behavior, ordering, or the meaning of side=0/1. With annotations covering the main safety concerns, this is a minimal but non-contradictory addition.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.