Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the burden of behavioral disclosure. It does well by specifying exactly what information is returned and how the result should be consumed by submit_enquiry. It is clearly an introspection/read-style tool, and the description gives enough context about the response contents even without an output schema.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.