Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden for behavioral disclosure. It only says 'Find requesters by name or email,' implying a read-only search but not disclosing key behaviors like whether it returns partial matches, case sensitivity, pagination, or the result format. The lack of any safety or return-value context is a significant gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.