Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description must carry the full burden of behavioral disclosure. It only states 'Delete' without noting that the action is permanent, irreversible, may require permissions, or what error conditions exist. A destructive tool should warn about consequences, which is missing.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.