Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already provide readOnlyHint=true and openWorldHint=true, covering safety and openness. However, the description adds no behavioral context beyond that, such as how missing properties are handled, permissions required, or the exact nature of the 'metadata' returned. Given the annotations, the lack of additional behavioral disclosure leaves a gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.