Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare it is not read-only, is open-world, and is non-destructive; the description adds meaningful context beyond that: the issue is read by humans on the team, a URL is returned, and critically 'A submission cannot be withdrawn' plus 'Free' (cost). The irreversibility disclosure is exactly the kind of behavioral trait an agent needs before submitting on a user's behalf.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.