Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
The annotation readOnlyHint=true already signals a read operation. The description adds value by clarifying the exact content (MCP audit trail, not Fusion transaction history) and implies no side effects. It does not describe pagination or response format, but for a simple read-only list tool, the provided context is adequate and consistent with the annotation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.