Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full burden but provides minimal behavioral context. It mentions 'authenticated user' (implying auth needs) but lacks details on rate limits, pagination, sorting, error handling, or what 'all assistants' entails (e.g., archived ones). This is inadequate for a list operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.