Synonyms: Hear Thoughts, Mental Scrying
Read Thoughts is a Prowess, this special kind of Feat can't be acquired unless the character has Divine Touch. A Prowess is a special action that can only be done once per scenario. Like any Feat, it can be acquired only once.
While speaking with a character, you momentarily gain insights into his thoughts.
Your character isn't hearing his thoughts per say, but using his deep psychological understanding, he manages to grasp everything his interlocutor is thinking.
A Trickster will know he is being scrutinised and will chose carefully his thoughts.