Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations, the description carries the full behavioral burden. It does disclose the key effect (control returns to player/KSP input), which is the important side effect for a lease-release tool. However, it does not say whether releasing a non-held lease errors, whether other flight operations must be stopped first, or the return payload.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.