Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the burden of behavioral disclosure. The phrase 'Gibt alle Ordner zurück' makes the read-only intent clear, but it does not mention pagination, sorting, authentication, or whether the operation has any side effects. For a simple zero-parameter list tool this is adequate but not rich.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.