Used the changed function wrong or I did the script wrong? [closed]

Here's the code I did. [Attempt 1] [ Game does not have FE enabled, for all attempts ]

game:GetService("Players").LocalPlayer.Backpack.Tool.Parent.Changed:connect(function()
    local plr = game:GetService("Players").LocalPlayer.Character.Name
    if game:GetService("Players").LocalPlayer.Backpack.Tool.Parent == game:GetService("Players").LocalPlayer.Character.Name then
        script.Parent:FindFirstChild("Frame").Visible = true
    else
        script.Parent:FindFirstChild("Frame").Visible = false
    end
end)

I maybe used the Changed function in a wrong way, but I changed a bit of things

game:GetService("Players").LocalPlayer.Backpack.Tool.Parent.Changed:connect(function()
    local plr = game:GetService("Players").LocalPlayer.Character.Name
    if game:GetService("Players").LocalPlayer.Backpack.Tool.Parent == plr then
        script.Parent:FindFirstChild("Frame").Visible = true
    else
        script.Parent:FindFirstChild("Frame").Visible = false
    end
end)