Newbie question about the security of mixing
Technically the others nodes you are connected to would see you sending the transaction to them but they wouldn’t know if it is your transaction or someone else’s and you are just relaying it.
There might be a scenario where someone has strategically placed lots and lots of nodes into the network and monitors when certain transactions arrive to each of them and might be able to narrow down where the transaction originally came from to a small set of nodes.
Using TOR would limit this potential deanonymization by obfuscating your IP (which is the identifying piece of info)