Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full burden and it does disclose the single most important behavioral fact: this tool does not itself create a plugin, it hands back a prefilled GitHub issue URL. It omits everything else an agent would want to know about a submission path - validation rules, duplicate handling, auth requirements, and whether any state changes server-side.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.