Why isn't my tool working? (Need this extra part for title)

I'm trying to make a tool that prints "fart" when its equipped and you click.

Player = game.Players.LocalPlayer
Character = Player.Character
Humanoid = Character.Humanoid
Mouse = Player:GetMouse()
local tool = script.Parent

function onEquipped()
Mouse.Button1Down:connect(function()
	print("fart")	

end)
end)
tool.Equipped:connect(onEquipped)

why isn't it working?

Use the tool.Activated event.

local Player = game.Players.LocalPlayer
local Character = Player.Character
local Humanoid = Character.Humanoid
local Mouse = Player:GetMouse()
local tool = script.Parent

tool.Activated:Connect(function()
	print("Fart")
end)