Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Without annotations, the description must fully disclose behavior. It only indicates permanence, but lacks details on required permissions, cascading deletions, or constraints (e.g., client must have no outstanding invoices or bills). The term 'permanently' is vague without further elaboration.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.