Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries full burden but only states it's a batch creation operation. It doesn't disclose critical behavioral traits like whether this requires specific permissions, rate limits, whether it's idempotent, what happens on partial failures, or what the response format looks like.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.