Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, destructiveHint=true and idempotentHint=false, and the description usefully narrows the blast radius by saying the video is not edited or republished. However, it says nothing about duplicate submissions creating multiple inbox entries (non-idempotent) or whether a submission can be withdrawn, which is the behavior an agent most needs to know here.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.