Ask HN: Why doesn't news.ycombinator.com provide a Meta Description?

Just noticed recently that Hacker News doesn't provide a meta description. Realized it when the description for a Google search lists snippets of presumably some of the latest posts:

  https://www.google.com/search?q=hacker+news

I took a quick search around the site and couldn't find an explanation. It's such a simple thing to provide, I'm wondering if there was a reason for it.