Token aliases are also great for interactive state changes e.g. a hover state on an icon. I have brand colors mapped to active and hover state on icons for example... For the designers benefit I can refer to the interaction in the alias name e.g. icon-hover, icon-disabled etc.... Which makes it easier for the designer to swap out the colors for different interactions.

I would also encourage you push the tokens to GitHub (this will handle your versioning and visually diffing) and I would use style dictionary to sweeten the deal for developers instead of passing them raw JSON as style dictionary will do the translation for you for various development needs.