Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
With no annotations provided, the description must disclose behavioral traits. It simply states 'Delete a company contact' without mentioning what happens on deletion (permanence, cascading effects, permissions required), or whether the operation is idempotent. This is a significant gap for a destructive operation.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.