How to animate an arm that is holding a tool? (with the tool ofcourse)

local tool = script.Parent
local handle = script.Parent:WaitForChild('Handle')

local Debounce = true
local slash = script.Parent:WaitForChild('Slash')

local click = false
local inAttack = false

tool.Activated:connect(function()
    inAttack = true
    if Debounce then
        Debounce = false
        click = true
        print('tool activated')

        local plr = game.Players:GetPlayerFromCharacter(tool.Parent)

        if plr then 
            handle.Touched:connect(function(hit)
                if inAttack then

                    print('animation')

                    -- Animation

                        local char = plr.Character
                        if char then
                            local hum = char:WaitForChild('Humanoid')
                            local slashTrack = hum:LoadAnimation(slash)
                            wait(0.1)
                            slashTrack:Play()
                        end

                    -- Tree damage

                    if hit.Parent and hit.Parent.Name ~= plr.Name and hit.Parent:FindFirstChild('Wood') then
                        wait(0.1)
                        local HP = hit.Parent.HP
                        HP.Value = HP.Value - 30
                    end

                else
                    print(Debounce)
                    print(click)
                end
            end)
        end

        wait(0.5)
        click = false

        wait(5)

        Debounce = true
    end
end)

Server script inside a tool in starterpack, this script isn't done! The problem is, the animation starts but it doesn't animate the arm holding the tool, and I'm a bit scared that the tool might not animate with it even if it was working, any ideas on how to do it?