"Audit every meta description on the site."

"Audit every meta description on the site."

Don't.

Google rewrites roughly two out of three of them anyway, so a site-wide audit is mostly cosmetic labor. Here's the version that's worth your afternoon:

— Export pages by impressions. Sort descending. The top 50 do 90% of the work.
— For each, check the SERP today — is Google showing your description or its own scrape?
— If it's pulling its own snippet, your meta is decorative. Leave it.
— If it shows yours and CTR is below the position-average curve, rewrite that one.
— In the rewrite, front-load the differentiator, not the keyword. The keyword is already bolded for you by the SERP.

That's it. Five steps, fifty pages, real impact.

The other 4,000 product descriptions on your store? Nobody reads them, Google ignores them, and templating them with a single variable is fine. (Yes, even "thin" ones. Meta description is not a ranking factor and hasn't been since 2009.)