MCC will send an alert when nodes in a pool have overlapping labels and a custom labels.

The alerts describes the following 

            description: "Node {{ $labels.exported_node }} has triggered a pool alert due to a label change. For more details check MachineConfigController pod logs: oc logs -f -n {{ $labels.namespace }} machine-config-controller-xxxxx -c machine-config-controller"

It is possible that admin may not be able to interpret exact action to be taken after looking at MCC pod logs. Adding runbook (https://github.com/openshift/runbooks) can help admin in better troubleshooting and taking appropriate action.