How do I fix this door script so I can re-lock it with a tool? Bool Value not working.

I think I see the issue here.

local Hinge = script.Parent.PrimaryPart
local opened = false
local door = script.Parent.DoorClick
local clickDetector = door.ClickDetector
local doorunlocksound = script.Parent.DoorClick.DoorUnlock
local doorlocksound = script.Parent.DoorClick.DoorLocked
local locked = false
local touchcooldown = false

function Open()
    if opened == false then
        opened = true

        for i = 1, 10 do
            script.Parent:SetPrimaryPartCFrame(Hinge.CFrame * CFrame.Angles(0, math.rad(9), 0))

            for _, v in pairs(script.Parent.Parent:GetDescendants()) do
                if v:IsA("BasePart") then
                    v.CanCollide = false
                end
            end

            wait()
        end
    else
        opened = false

        for i = 1, 10 do
            script.Parent:SetPrimaryPartCFrame(Hinge.CFrame * CFrame.Angles(0, math.rad(-9), 0))
            wait()

            for _, v in pairs(script.Parent.Parent:GetDescendants()) do
                if v:IsA("BasePart") then
                    v.CanCollide = true
                end
            end
        end
    end
end

script.Parent.DoorClick.ClickDetector.MouseClick:Connect(Open)

-- the issue vvv
door.Touched:Connect(function(k) 
    if k.Parent.Name == "Master Key" and locked == false and touchcooldown == false then --//Changed it so it checks if its locked or not before running the line.
        touchcooldown = true
        doorlocksound:Play()
        locked = true
        clickDetector.MaxActivationDistance = 0
        wait(2) -- change to whatever
        touchcooldown = false
    elseif k.Parent.Name == "Master Key" and locked == true and touchcooldown == false then --//Changed it so it checks if its locked or not before running the line.
        touchcooldown = true
        doorunlocksound:Play()
        doorlock.Value = false
        clickDetector.MaxActivationDistance = 12
        wait(2) -- change to whatever
        touchcooldown = false
    end
end)

I think the issue lies around the fact that you are not checking whether or not the door is locked before you try locking/unlocking it. I made it so if the key touches the door it checks to make sure the key is touching it and I also checked if the door was locked. If the door was locked then it would play the unlock vice versa!

I also added a cooldown so the door doesnt lock and unlock a bunch of times when you move the key into it.