The Senegalese striker has slipped down the attacking pecking order at Stade Louis II after seeing Monaco flex their financial muscles.
Radamel Falcao has been drafted in for big money and will lead an assault on the Ligue 1 title next season.
With it looking as though first-team opportunities may be hard to come by in France, Toure accepts that moving on would be a sensible choice.
Celtic are believed to be keen on reaching a loan agreement, as they look to bring added firepower into their ranks.
Toure is ruling nothing out, with the 27-year-old eager to build on his exploits from 2012/13 - in which he netted 18 times as Monaco secured promotion back to the French top flight.
He said: "I wanted to show I can play in the French top league. But if the coach doesn't give you the chance it's normal to think of an exit."