Punch tool does damage when not clicking?

I'm trying to make a good punch tool but even though it is unequipped and I am not clicking it still does damage to the enemy NPCs. How can I fix this? (script) I've already tried things like: -tool.Activated -debounce

Here's the script:

local tool = script.Parent
local hitsound = tool:WaitForChild("Hit")
local canattack = tool:WaitForChild("CanAttack")
local plr = tool.Parent.Parent
local char = plr.Character or plr.CharacterAdded:wait()
local larm = char:WaitForChild("LeftHand")
local rarm = char:WaitForChild("RightHand")

larm.Touched:Connect(function(hit)
    local hum = hit.Parent:FindFirstChild("Humanoid")
    if canattack.Value == false then
        if hum then
            canattack.Value = true
            hitsound:Play()
            hum:TakeDamage(10)
            wait(.5)
            canattack.Value = false
        end
    end
end)
rarm.Touched:Connect(function(hit)
    local hum = hit.Parent:FindFirstChild("Humanoid")
    if canattack.Value == false then
        if hum then
            canattack.Value = true
            hitsound:Play()
            hum:TakeDamage(10)
            wait(.5)
            canattack.Value = false
        end
    end
end)