Find a clean/concise way to represent important information regarding attributes

I'm trying to work out a clean and effective way of including information like `required` and `conditionals` without clogging the templates up and distracting from the yaml content. I suspect comments would do this. Ideally I'd like to still enable people to use these as base templates for their infrastructure, and if there is too much other information in them, it'll result in people having to delete heaps of information. But on the other side of it, that's also a good thing about commenting, as people could _technically_ leave it in the templates.