Despite some inconsistent displays, especially going forward, Spurs have secured Europa League football by finishing sixth in the Premier League.
Given their position when Mourinho took over from Mauricio Pochettino this season, Bent thinks he has done a good job.
"For them to finish sixth this year, what an achievement that is. They were way out of the race and to come back into it, Mourinho's got to take a lot of credit," the former Spurs striker told Football Insider.
"He knows full well they need to do better next season and so he'll have his eye on who he wants and the players he wants but first and foremost we've got to give him a round of applause and say job well done.
"The staggering stat that no manager had won more games than Mourinho, other than Klopp and Guardiola since he took the job, that is an unbelievable stat – whatever football he's playing, it's clearly working.
"He's done a very, very good job and I expect them to be better next season. It's a really big season for some of their players, the likes of Harry Kane – what does he do next season with the ambition he shows? That's a really, really big year for him.
"First and foremost they need to go and get some players but I fully expect, once Mourinho's got a full summer in, I expect them to be even better next season."