Comprehensive and Detailed Explanation:

The VCF Operations 9.0 Monitoring Guide specifies: “For any alert definition to be active in the environment, it must be associated with and enabled in an Active Policy.” . Creating symptom and alert definitions only defines conditions; they do not generate alerts until policies include them. REST notification plugins or payload templates are used for outbound integrations, not for enabling alerts. A super metric is only needed for custom composite KPIs, not for native read latency which is a standard metric already available. Therefore, the required step is to enable the alert in an Active Policy so that when the symptom triggers (latency > 1 ms), the alert activates.