The left-back is in line to feature in the Magpies' next game - which will come at the start of next month when they travel to the Britannia Stadium to face Stoke - after missing the last two games due to a hamstring injury (via Chronicle). And McClaren hinted that his return will provide a major lift as the club look to drag themselves away from danger.
"He's a strong runner but his character and attitude are vital to this team," he told the Chronicle.
"The quality of right wingers he has had to contend with is impressive.
"We have asked him to do the job with good quality and generally, he's done it."
The 24-year-old's performances often go under the radar, but his absence was certainly felt during the club's last game as a 5-1 defeat to Chelsea sent the side back into the relegation zone.
Rolando Aarons was the man tasked with filling in for Dummett at Stamford Bridge, but the winger's defensive frailties were exploited by the Blues who essentially killed the game off inside the first 20 minutes.
Upon his return to the side, McClaren will need the Wales international to hit the ground running immediately and prove that he deserves to be so highly thought of at St James' Park. With 12 games to go, Newcastle are third-bottom and the manager will know that more defeats like the one they suffered against Chelsea will leave them in serious danger of falling into the Championship.