Meta Description to show when sharing post?

When you say “meta description” do you mean the HTML Meta name=”description” tag from the head of the document?

What are you using to set that meta description? Most likely some form of SEO plugin.

I’d need to account for different plugins’ ways of setting that.

Meanwhile, of course you can copy your meta description into the WPBook Lite message area before posting – but I assume you mean automatically.