Why isn't this welding script working in the command bar?

I have a welding script I want to assign to a tool in workspace named "Long Bow". Here's the script:

local t = workspace["Long Bow"]
local h = t.Handle
local e = {}

for i,v in pairs(t:GetChildren()) do
	if v:IsA("BasePart") then
		local w = Instance.new("Weld", game.JointsService)
		w.C1 = v.CFrame:toObjectSpace(h.CFrame)
		w.Part0 = h
		w.Part1 = v
		table.insert(e, w:Clone())
	end
end

for i,v in pairs(e) do
	v:Clone().Parent = game.JointsService
end

When I put this in a script in Workspace or inside the tool, it works fine. But when I paste it into the command bar it doesn't do anything. Why is that?