Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full transparency burden. It states exactly what metadata is returned and, by pointing to submit_enquiry for sending answers, implies this tool is a read-only lookup rather than a submission action. It could explicitly state 'read-only' or 'does not submit', but the wording is sufficient for this metadata tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.