Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The description adds 'Read-only' and 'fuzzy match' behavior beyond the annotations (openWorldHint=false, destructiveHint=false), clarifying that this is a non-mutating suggestion tool. It does not detail edge cases like no match or multiple matches, but the read-only declaration is valuable.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.