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 does disclose the most important trait: the deletion is irreversible. It says nothing about required permissions, whether attached comments/checklists/time logs are cascaded or orphaned, or whether any confirmation step exists — significant gaps for a destructive mutation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.