Roblox Script Generated by ScripterAI

"create a local script inside a tool that plays a idle animation when the player is standing and running while holding the tool"

-- local script inside a tool 
local tool = script.Parent
local Players = game:GetService("Players")
local player = Players.LocalPlayer
local character = player.Character or player.CharacterAdded:Wait()
local humanoid = character:WaitForChild("Humanoid")
local idleAnimation = "http://www.roblox.com/asset/?id=INSERT_IDLE_ANIMATION_ID_HERE"
local runAnimation = "http://www.roblox.com/asset/?id=INSERT_RUN_ANIMATION_ID_HERE"

local idleAnimTrack = humanoid:LoadAnimation(idleAnimation)
local runAnimTrack = humanoid:LoadAnimation(runAnimation)

local function onEquipped()
    idleAnimTrack:Play()
    runAnimTrack:Stop()
end

local function onUnequipped()
    idleAnimTrack:Stop()
    runAnimTrack:Stop()
end

local function onStateChanged(oldState, newState)
    if newState == Enum.HumanoidStateType.Running then
        idleAnimTrack:Stop()
        runAnimTrack:Play()
    elseif newState == Enum.HumanoidStateType.RunningNoPhysics then
        idleAnimTrack:Stop()
        runAnimTrack:Play()
    else
        idleAnimTrack:Play()
        runAnimTrack:Stop()
    end
end

tool.Equipped:Connect(onEquipped)
tool.Unequipped:Connect(onUnequipped)
humanoid.StateChanged:Connect(onStateChanged)