Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden of behavioral disclosure. It simply says 'Delete a script folder' without mentioning irreversibility, required permissions, cascade effects, or what happens to contained scripts, offering no transparency beyond the literal action.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.