Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, and destructiveHint=false, covering the safety profile. The description adds a little interpretive context beyond the annotations with the held/occupied and land unsellable distinctions, but it does not describe response behavior, authentication needs, or edge cases. Since annotations carry much of the burden, a mid score is appropriate.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.