how to add tool idle animation?

i tried to add animation into my tool but it wont play correctly

script.Parent.Equipped:connect(function()
    local anim = Instance.new("Animation")
    anim.AnimationId = "http://www.roblox.com/asset/?id=1649093325"
    local play = game.Players.LocalPlayer.Character.Humanoid:LoadAnimation(anim)
    play:Play()
end)

the animation DID work but the right arm and torso didn't want to load the animation and its not looped. i tried "while true do" stuff but it still result the same thing.