If I search for the "No AI" tag, click on any result, then click on "more information", I can see "No AI" among the list of tags. So you can see if something is marked as "No AI".
However, the converse for the "AI Generated" tag is not true. If I search for the "AI Generated" tag, click on any result, then click on "more information", I can't see "AI Generated" in the list of tags.
I don't know why it works this way, but if it's AI-safe, then it should have the "No AI" tag which is visible, and if it doesn't have a visible "No AI" tag, then it's not AI-safe.
Interestingly, I can get some search results by searching for both "No AI" and "AI Generated" at the same time.