Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, openWorldHint=false, and destructiveHint=false, so the safety profile is fully covered. The description adds a meaningful nuance — 'indexed full text' discloses that fulltext is only available when indexed — but does not mention return format, error behavior, or how the key is obtained. No contradiction with annotations; 'Read-only' aligns with readOnlyHint=true.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.