Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description only says 'List all accounts', which implies a read-only operation, but it does not disclose any behavioral traits such as pagination, ordering, response format, or whether archived accounts are included. With no annotations provided, the description carries the full burden and fails to add meaningful behavioral context.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.