Here's what our Tour page says right now:
Code Golf Stack Exchange is a question and answer site for programming puzzle enthusiasts and code golfers. It's built and run by you as part of the Stack Exchange network of Q&A sites. With your help, we're working together to build a library of programming puzzles and their solutions.
We're not a Q&A site. Our tour page probably shouldn't say that. In fact, I'd like to make a much clearer distinction that we are not like the rest of the SE network. I am able to edit it, so what should we change it to?
Also, should it contain something about the Sandbox? There's no other logical place to put it in the tour page, and at the bottom of the tour page, there's an "Ask Question" button directly, so new users will see that before anything mentioning the Sandbox. I'm not sure about this idea, since it's not really part of the "what we're about" which is what the first section seems like it should be about.