Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false and destructiveHint=true, so the description's 'Writes mod files into the game through Vortex' is consistent and useful confirmation of exactly what is mutated. It also discloses the return shape ('Returns a job ID'), which matters because no output schema exists, but it stops short of saying what happens to previously deployed files or whether the job can be awaited/cancelled.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.