Toback denied those original accusations and did not respond when the paper published new accounts, which had not been verified.
Vanity Fair said he had declined to comment on their article.
Blair claimed in the article that Toback persuaded her to perform a monologue while she was topless in a hotel room in 1999.
She said he then rubbed himself against her leg, then told her: “There is a girl who went against me. She was going to talk about something I did.”
He then allegedly told Blair that the “girl” would end up “in the Hudson River with cement blocks on her feet” if she ever spoke about what happened.
In her account, McAdams said Toback invited her to his hotel room after asking her to audition for a role, and that “pretty quickly the conversation turned sexual”.
“It was all so confusing,” she told Vanity Fair. “I kept thinking, ‘When are we getting to the rehearsal part?'”
Toback allegedly went to the bathroom and returned to make a sexual proposition. McAdams said she excused herself, feeling she had been in the room “forever”.
“I kept thinking, ‘This is going to become normal any minute now. This is going to all make sense. This is all above board somehow,'” she is quoted as saying. “Eventually I just realised that it wasn’t.”
McAdams said she felt lucky that “he didn’t actually physically assault me in any way”.