Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. 'Show' implies a read-only operation, which is useful, but the description does not reveal any behavioral traits beyond that: no mention of return format, pagination, whether it includes replies, authentication needs, or error behavior. A single verb is thin transparency for an unannotated tool.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.