Directives can be declared to have arguments and defaults value and be bound to a certain location.

directive @length(max: Int = -1) on FIELD_DEFINITION | INPUT_FIELD_DEFINITION

The above directive should not be able to be put on a type Object say in strict mode.

We should have the ability to parse and enforce these.

I think it will need a "strict mode" (default off) since currently you can put on directives without them being enforced.