The Cardiff City loanee was handed a start against his former club on Saturday, and he helped Wolves to pick up a 2-1 win.
Le Fondre’s performance in the contest caused the Millers’ defence a number of problems, and Jackett says that he was pleased to see the 29-year-old show such commitment.
"I was pleased with Adam (against Rotherham), with his work rate, with his energy,” Jackett said.
"He’s a hard-working player, committed, and if we get our game right and our balls right he’s very good down the sides and hard to mark.
"If the ball goes back to front he’ll put challenges in and won’t shirk out, but that’s not necessarily his game."
Le Fondre has struggled for starting opportunities since joining Wolves in the summer transfer window.
The predatory finisher has generally played second fiddle to Benik Afobe during his time at Molineux so far.
And Jackett admits that getting Le Fondre into his team is a challenge, as his style means he needs to be surrounded by the right type of players to be effective.
"Getting enough physical presence [alongside him] is important, but I was pleased with his attitude and he hasn’t let us down whenever he’s played," Jackett added.
"It's about finding a compliment around him that can handle the physical side and then bring him into play."
Le Fondre played 17 times for Wolves this season, and he has scored on three occasions. He will now be hoping to keep his place, with the Midlands’ side’s next match coming against Nottingham Forest at the weekend.