Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It helpfully adds that 'All documents in the collection will also be deleted,' which is crucial context beyond the basic 'delete' action. However, it doesn't address other important behaviors: whether deletion is permanent or reversible, what permissions are required, if there are confirmation prompts, or what the response looks like (success/failure indicators).
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.