Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the trailing 'Read-only' adds nothing beyond structured data. The description discloses no behavior beyond that — nothing about what the contract contains, whether contract_version changes the returned shape, or how large the payload is.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.