I do hope that technique stays off the claimed list though, seems like a general technique and I've been using it for a bit.
I feel like the Mind Reading technique is a Yamanaka clan jutsu similar to the Nara's shadow manipulation. The Yamanaka clan is the only clan in the series that specializes in specifically mind based jutsu or techniques, so it makes sense. According to the Wikia, the people who have been involved with performing this jutsu are: Aoba Yamashiro, Inoichi Yamanaka, Mozuku, Shimon Hijiri, and Tonbo Tobitake. However, the only person who actually
used the technique (in the canon manga/anime) was Inoichi. Everyone else simply aided Inoichi by maybe lending him chakra and/or helping him concentrate.
None of them actually went into the path's mind to drag out information besides Inoichi.
The one and only disconnection of the theory of only Yamanaka being able to read minds like this is in a single anime non-canon/filler episode (Shippuden #227, Adventures at Sea arc) where Guy gets kidnapped by some bird and taken to a lost island. This arc was so filler that it aired in Japan in 2011, but didn't make it to America. There are apparently tons of things wrong with this episode such as: a girl being able to summon Pain's giant snake-tailed chameleon and naruto's sage mode elongating his canines for some reason. Furthermore this particular arc was directed by Hayato Date and not Kishimoto. In fact, Kishi doesn't legally have any creative say with how the Anime production company decides to take the aired series. So if the Anime producer decides that he wants a filler episode with Sasuke going sage mode for shits and giggles, Sasuke will have sage mode for a single episode. Soooo~ Based on all of that, I don't really think any information learned from this arc can be considered legitimate.
But in the end it all comes down to whether or not we consider filler anime episodes as "legitimate" on the shinobilegends RP universe here. But I feel like this will most likely just slide by since people have already been using it? Of course, I might be shaky with some of the finer details so if any of you can provide evidence otherwise, feel free to correct me.
TL;DRThis jutsu is a Yamanaka clan technique unless we consider a ridiculously-filler anime episode legitimate.