What they are calling "tokens" are just their design elements. They have abstracted the design elements into their 'tokens' so that they are defined parameters

What they are calling "tokens" are just their design elements. They have abstracted the design elements into their 'tokens' so that they are defined parameters/variables/model-elements that can then be reified at some point before deployment. This is a fancy way of encompassing a system's design decisions into a model, which can then be used either abstractly or concretely to proliferate them into the entire system, as needed, at the latest possible point the actual values are needed. It really looks like top-shelf work, but I think their deciding to use the word "token" was an unnecessary mistake.