Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It does reveal that search spans multiple fields, which is useful context, but it does not describe matching semantics, sorting, pagination, or the response format. This is partial transparency at best.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.