Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden, and 'List' does make clear this is a non-mutating enumeration rather than a scan. However, it says nothing about whether calling it triggers any analysis, whether the result includes pattern IDs, descriptions, or severities, or how large the listing may be — and no output schema exists to fill that gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.