That is the view of ex-England and Middlesborough defender Danny Mills, speaking exclusively to Football Insider after Jones confirmed his role at the club.
As quoted by the Guardian (October 22), Jones revealed he had been given “assurances on my long-term future”.
Newcastle drew 1-1 with Crystal Palace in his first game in charge before losing 3-0 to Chelsea at St. James’ Park this weekend.
“It would be silly not to keep Jones,” Mills told Football Insider correspondent Connor Whitley.
“It doesn’t matter who comes in, he knows the set-up, he knows the players and he can help any new manager settle into the club.
“In my opinion, that’s a no-brainer, that should be an absolute definite.
“A new manager can still bring in their own people. But they’ll also have someone next to them.
“Because do they know anything about the players? Anything about their personalities? Anything about the club? Anything about the training ground?
“Why would you not have someone there who knows it? You can say ‘Do us a favour, go and give them a bit of a warm-up for a little bit while we get set-up before we do our bit.
“You need somebody like that around. I think that’s really important.”
He has also been a part of the coaching staff at Swansea City, Wigan Athletic, Everton, Belgium, West Brom, Bournemouth and England.