Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the burden of behavioral disclosure, but it only restates the operation: it says nothing about return shape, pagination, ordering, or absence of side effects. The schema's country format is the only extra signal, and it comes from the schema, not the description.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.