While I don't blame the hiring managers or recruiters or whatever (my team is constantly struggling with not having enough time/energy to hire well), if the only goal is to reduce the volume of applications, there are better ways. In fact this is just about one of the worst ways to do so probably, since it's pretty much arbitrary.
A simple way would be to make the job listing quite specific about expectations and say "Please do not apply if you can't do/don't know X and Y at minimum. If you can/do, submit your resume with a note affirming that you can/do." Any resume that doesn't come with that note can get canned, some people will lie, but you filter out the lowest effort applications which seems to me a better proxy for quality than beating your adversarial AI in a blind game.
A simple way would be to make the job listing quite specific about expectations and say "Please do not apply if you can't do/don't know X and Y at minimum. If you can/do, submit your resume with a note affirming that you can/do." Any resume that doesn't come with that note can get canned, some people will lie, but you filter out the lowest effort applications which seems to me a better proxy for quality than beating your adversarial AI in a blind game.