Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full disclosure burden and delivers essentially nothing: no statement that this is a read-only operation, no pagination behavior, no indication of what happens with an invalid or missing binary, no return format. The presence of limit/offset in the schema hints at pagination, but the description contributes no behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.