Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
No annotations are provided, so the description carries the burden. Equating the tool to GET /api/v1/appointments usefully signals a read-only, idempotent operation, and 'dieses Tenants' discloses implicit tenant scoping (no tenant parameter needed). It says nothing about result volume, pagination behavior, or what the records contain beyond the schema's page/limit fields.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.