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. It confirms a listing operation but does not disclose that it is read-only, potential authentication needs, or the effect of the 'include_deleted' parameter. The behavior when 'helpdesk_id' is provided is implied but not explicit.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.