Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of explaining behavior. It discloses exactly what the tool returns: the fields' keys, labels, types, required flags, help text, and allowed options. The wording suggests a read-only metadata lookup, and directing answers to submit_enquiry reinforces that this tool itself does not submit. It does not mention side effects, but none are implied.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.