Hi @Reyer_Sneller! You mention these are input values—are these additionalScope values by any chance?
https://community.retool.com/t/how-to-use-additional-scope-additionalscope-in-your-queries/13343
If so, the double curlies are definitely required so the query knows the difference between the string of "Action" and the additionalScope value that you named Action.
Additionally, if you are indeed using additionalScope to insert values into the placeholders in your Google Sheets query, it's actually correct that the values show up as undefined/red. This is because the values don't get defined until they're populated via the additionalScope!
If you're not using additionalScope, let me know how these values are currently being filled!