This read-only INTEGER identifies the comparison operator applied against the item's limit to determine if an alerting event occurred, such as equal, not equal, less than, or greater than, and is undefined for string, data, or queue types. An administrator cares to understand exactly what condition triggers an alert for that metric. For example, seeing this operator reported as greaterThan(5) tells an admin an alert fires only when the value exceeds, not merely reaches, the configured limit.