Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Beyond the readOnly/destructive annotations, it discloses meaningful behavioral traits: newest-first ordering, the compact report shape, team-level scoping, automatic masking of emails and phone numbers, and the instruction to reference respondents by examineeId because masks are not stable identifiers. This is genuinely useful context that the annotations alone do not provide.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.