This should also provide a help text. There are plenty of examples in the rebased `create_policy.rb`, but something like this (adapted from [the PE documentation](http://docs.puppetlabs.com/pe/3.2/razor_reference.html#create-policy)) would suffice:
```
    The metadata applied to Allows a policy to apply metadata to a node when it binds. This is NON AUTHORITATIVE in that it will not replace existing metadata on the node with the same keys it will only add keys that are missing.
```