Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full behavioral disclosure burden, but it only restates the retrieval intent already implied by the name. It does not disclose pagination, data completeness limits, authentication needs, or whether the tool is read-only beyond the obvious 'Get' phrasing.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.