A while back there was a revamp of the ask page which introduced a lot more per site customization. Of relevance here is that we can have the page react to tags:
Tag-related error messages and warnings, regex-based (seen with custom error text in screenshot 4, with the default text on screenshot 5, and with a tag warning here).
The warning and error messages described in the two bullet points above have a limit of 1000 characters.
We occasionally still get questions tagged with game-recommendation and tool-recommendation. While the excerpts rather aggressively declare them off-topic, those are obviously not read often enough and the existence of the tag gives the impression the question type is on topic (because why else would we have the tag?).
We have what looks to me like a nail and a suitable hammer, now to make sure we strike true; we need good text for the warning or error. Some considerations:
Making it an error will prevent the question from being posted with the tag.
I think we'll want to guide askers to fix the question type or frame rather than just omitting the tag.
I'm assuming the two tags are similar enough that the text will be either near identical, or we can just use the same one keying off "- recommendation", thus covering them both as part of this question.