Graham W’s book Play Unsafe has a section, as I recall, on “open secrets,” which is not the same as your radical transparency, but I think is adjacent. If I’m reading you right, you’re talking about saying aloud “this is the in-fiction result I want from engaging this rules mechanism, and we’ll all have more fun and dial the procedures in tighter if we understand what’s at stake” and open secrets is the roleplaying parallel. “I am acting this specific way because my character is motivated by this big secret, which you don’t know about, but player-as-audience-you will appreciate this more if you know it, even as player-as-character-you does not.”