Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries full responsibility for behavioral disclosure. It mentions using configured credentials and performing a login, but does not state whether this has side effects (e.g., creating a session), how failures are handled, or what the response indicates. This is a significant gap for a tool that performs an authentication action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.