I think robots.txt isn't suitable for this for the same reason it's not suitable...

		JohnFen on July 10, 2023 \| parent \| context \| favorite \| on: Google to explore alternatives to robots.txt I think robots.txt isn't suitable for this for the same reason it's not suitable for keeping other bots from crawling your site: adhering to what robots.txt says is optional, and plenty of bots opt to ignore it.