Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Since no annotations are provided, the description carries the full burden. It indicates a read-only operation via the verb 'List' and specifies the return type (images, files). However, it does not disclose pagination behavior (limit/offset), return format, or any potential side effects. For a list operation, this is adequate but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.