From what I recall through lua, each animation is bound to a player and when someone plays their animation, server will run it, so everyone will see it. That can be abused to slow down performance, with current version having it the worst, so I'd suggest to use it with the peer to peer multiplayer with people you trust. As well as 2 players can create animations on same entity which may be kind of conflicting, and tool doesn't have checks to prevent that, and it'll probably go weird if both play the animation on that thing