The forward is close to making a return after a betting violations ban that is keeping him out of the game until mid-January.
However, Bees fans are concerned that Toney may be sold in the January window before he is even eligible to play again.
In an interview with The Standard, Frank stated on Toney and the club's ability to hold onto him: “Everyone saw what he did last year.
“It's not like he broke a leg or did his ACL, so he's fit and probably even more ambitious to get success. I'm convinced he will be absolutely on it.
“I don't want to lose him. I hope, and think, he'll be a Brentford player on February 1."