Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden for behavioral disclosure. It reveals the auth requirement (YAMLTools API key) and the semantics of folderId=null for root. However, it does not disclose potential side effects, such as whether the diagram is removed from its previous folder, or whether the operation is reversible. The coverage 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.