Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=false, idempotentHint=false and destructiveHint=false, so the agent knows this is a non-idempotent mutation that isn't destructive. The description adds the timing semantics ('run immediately'), which is genuinely valuable context, but says nothing about whether this produces a deployment/release, what it returns, or whether triggering is safe to repeat.
Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.