Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations declare readOnlyHint=true consistent with 'Get', a read operation, so there is no safety contradiction. The description adds value by disclosing what the response includes (domain, importance, SERP top pages, top keywords), which goes beyond the annotation. However, it doesn't address potential costs like enriched/rank data freshness or whether the response could be empty for new competitors, leaving some behavioral gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.