I am Having Trouble With A Script Which Is Ment To Do Something When A Tool Is Held In A Area?

So Whats Happening Is I Am Trying To Make A Script Which Tiggers When A Player Holds A Tool In A Area It Triggers This Is The Script I Thought Of But Doesnt Work

script.Parent.Touched:Connect(function(plr)
	local Char = plr.Parent
	local Tool = Char.Tool
	if Tool then
		script.Parent.Value = true
	end
end)