Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions validation but doesn't specify what happens during validation (e.g., returns errors, warnings, or a success status), whether it's read-only or has side effects, or any permissions/rate limits. This leaves critical behavioral traits undocumented.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.