Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and destructiveHint=false, so the description's 'Read-only' adds no new safety information. It does add useful content context by specifying the ledger includes both wired and refunded investor rows, matching the capabilities of the tool. However, it does not describe return format, pagination, or other behavioral details, keeping it at a mid-level score.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.