That’s possible for a site to do, as far as I’m aware (in webmaster tools?) - I’ve seen results with a title and link and “this website doesn’t allow us to show a preview before).

This ‘debate’ in Australia is not actually about that - most people supporting the bill haven’t been able to make an argument with enough complexity to distinguish between the sentence or so summary and displaying the whole article, and they generally try to make it sound like the latter is happening!