Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations at all, the description carries the full burden of behavioral disclosure. It implies a read-only enumeration, but never states that the call is side-effect free, whether the preset list is static or account-specific, or whether any auth is required. For a zero-annotation tool this is a real gap.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.