While Leeds are well on course for securing a playoff spot again this year, McDermott is demanding his players to improve.
"We aren't content where we are, but if you asked me if we wanted to be on top of the ladder after round 13, I'd say yes, I will take that," he told the Yorkshire Evening Post.
"But I will qualify that. If we had to go into the playoffs now - or a Challenge Cup final or semi-final - I don't think we are where we need to be.
"We have got a little while yet to keep honing what we have got to do and keep sharpening our tools. There's clearly some things that are working well for us. Our challenge is to keep those traits within us."
Leeds continue their Super League campaign on Friday at home to Hull FC.