Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral disclosure burden. It implies a read-only operation but does not disclose response structure, pagination, ordering, or required permissions. The description is essentially a restatement of the tool name, adding minimal 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.