This object sets the severity level that, once checkResultSeverity meets or exceeds it, triggers a notification to the manager; a value of 0 means no notification will ever be sent for that check regardless of failures. An admin tuning alert noise sets this threshold higher for lower-priority checks, so only serious failures notify, while leaving it lower or unset for critical checks where any failure severity should be surfaced immediately. A check with this object set to 5 would only send a notification once a failing rule's severity reaches at least 5, silently tolerating lower-severity rule failures.