It depends on what's important for the campaign. The gods are competing with all other elements of your worldbuilding for your writing time (and your players' ability to absorb and retain information).

If the campaign will prominently feature machinations between the gods (or their followers), you'll probably want a fair amount of detail, such as portfolio, relationship with other deities, noticeable characteristics of worshippers, etc.

If you don't expect the gods to be particularly relevant, you can probably get away with just name, portfolio(s), holy symbol, and (maybe) alignment.