Update alert rules guidelines
@@ -37,3 +37,10 @@ When creating a KubeVirt alert rule, please see the following :
2. Create an alert runbook at [KubeVirt runbooks](https://github.com/kubevirt/monitoring/tree/main/runbooks).
3. Alert rule must include `runbook_url` with the link to your runbook from step #2.
4. Alert rule must include `severity`. One of: `critical`, `warning`, `info`.
+
+ NOTE:
+ - Critical alerts - When the service is down and you loss critical functionality, an action is required immediately.
+ - Warning alerts - When an alert require user intervention. A more serious issue may develop if this is not resolved soon.
+ - Info alerts - When a minor problem has been detected. It should be resolved relatively soon and not ignored.
+
+5. Alert `message` must be verbose, since it is being propagated to the [metrics.md](https://github.com/kubevirt/kubevirt/blob/master/docs/monitoring-guidelines.md) file, when running `make-generate`.
\ No newline at end of file
