Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden, but the operation is a zero-parameter enumeration with low risk, and 'list all ... that the scanner can detect' adequately conveys that it is a read-only catalog dump. It stops short of describing what a pattern entry contains or how patterns relate to the scan tools.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.