Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden, and it only discloses that the deletion is permanent. It says nothing about required permissions, whether related records (opportunities, orders) are affected, error behavior for invalid IDs, or what the call returns.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.