Is this not working, or am I stupid?

[paper moth]

local Players = game:GetService("Players")

local function onPlayerAdded(player)
local backpack = player:WaitForChild("Backpack")

backpack.ChildAdded:Connect(function(item)

    if item:IsA("Tool") then
        print(player.Name .. item.Name)
    end
end)

end

Players.PlayerAdded:Connect(onPlayerAdded)

(It basically detects when a tool is added to the player's backpack)

[west bramble]

this does work for detecting when something is added to the player's backpack
if you are picking something up from the ground the tool will be parented straight to the character, avoiding the backpack.childadded

[feral fjord]

try charscteradded