Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, the description must fully disclose behavior, but it only states the action 'List'. It does not explicitly confirm read-only safety, mention output format, or note any error conditions (e.g., missing connection). While 'List' implies a non-mutating operation, the lack of explicit disclosure leaves significant gaps.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.