"og:description" vs. name="description"
-
According to Rock Your SEO with Structured Social Sharing "OG description overrides meta description tag."
Moz Crawl Diagnostics seems to ignore og:description and only look for meta name="description" - does that mean my meta descriptions tags should be meta name?
-
Yes, on social sharing -- when posting to Facebook, Pinterest, etc. -- OG tags will override your meta description tag. Best practice is to have both, and in most cases, you'll probably find that the information will the same for the page.
As far as the Moz Crawl Diagnostics, unfortunately, it doesn't read OG tags right now. We are working on improvements for better suggestions, and more types of meta information is definitely on the to-do list.

-
I am running into this issue - It has been many years and surprised to see it is not updated.
-
@Architechs - You'll need to follow up with help@moz.com as I'm no longer a staff member.