Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint, so the safety profile is fully covered. The description adds only the endpoint path and the word "definition," which mildly clarifies that this returns a definition rather than an execution record; it says nothing about error behavior for a bad workflowId or what the payload contains. Adequate but thin given annotations carry the load.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.