How do you make it so the tool deletes when an npc dies?

Tool = script.Parent
if script.Parent.Humanoid.Health == 0 then
	Tool:Destroy()
end

i wanna make it so when an NPC dies it automatically drops the tool but apparently this script doesn't work how do i make it drop the tool?

Try putting a script in a tool (which is inside the NPC I assume), and paste this:

local tool = script.Parent

tool.Parent:WaitForChild("Humanoid").Died:Connect(function()
	tool:Destroy()
end)