Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, so safety and external-data reach are covered. The description adds that results are geo-personalized and match the homepage feed, which is meaningful context, but it says nothing about result count, freshness, or pagination.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.