Organisations usually come up with some best practices for monitoring and managing pods. A new policy could enforce a configurable list of labels to be mandatory to run a pod in the environment.
For example all pods should have an app label.

The policies.Config would need to be extended with a new field.

type Config struct {
...
PolicyMandatoryPodLabels  []string
}

🤔 Extensions

• While this issue is for pods only it makes sense to think about enforcing labels for other components as well.
• Another extension could be enforcing annotations on a type. For example kubernetes.io/ingress.class must not be empty for an ingress on a multi ingress-controller environment.