My Tool doesnt play the animation for some reason, and I don't know why?

So basically, I have this script that heals the player fully, and I wanted to add an animation while healing, but then it completely breaks the script

Script

Tool = script.Parent
local healAnim = script.heal


local field = nil

function Heal()

	

	local vCharacter = Tool.Parent

	local childs = vCharacter:GetChildren()

	local colors = {}

	for i=1,#childs do
		if (childs[i].className == "Part") then
			colors[i] = childs[i].BrickColor
			childs[i].BrickColor = BrickColor.new(1)
		end
	end

	wait(1)

	local human = vCharacter:FindFirstChild("Humanoid")
	if (human ~= nil) then
		human.Health = human.MaxHealth
                healAnim:Play()
	end

	for i=1,#childs do
		if (childs[i].className == "Part") then
			childs[i].BrickColor = colors[i]
		end
	end


end



Tool.Enabled = true
function onActivated()

	if not Tool.Enabled then
		return
	end

	Tool.Enabled = false

	Heal()

	Tool.Parent = nil
end


script.Parent.Activated:connect(onActivated)

Solution I tried to use but didnt work, I put in a different Script that would play the animation but it didnt work either

Script:
script.Parent.Equipped:Connect(function(Mouse)
    Mouse.Button1Down:Connect(function()
       animation=rbxassetid://5280560587
game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(script.Parent.Animation)
        animation:Play()
    end)
end)

script.Parent.Unequipped:Connect(function()
        animation:Stop()
end)