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 explains the ranking intent but does not mention that the tool just reads data, that results are limited, that ascending defaults to false, or what fields are returned. Several important behaviors are left to the schema or to inference.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.