tool script not working?

Ok, your problem is that you forgot to set your debounce back to false after you clicked, since it stayed to true it would not execute the rest of your code. Remember to always check your debounces.

local players = game.Players
local tool = script.Parent
repeat wait() until players.LocalPlayer and players.LocalPlayer.Character
local player = players.LocalPlayer
local character = player.Character
local humanoid = character:WaitForChild("Humanoid")
local debounce = false


tool.Activated:connect(function()
    if debounce then return end
    debounce = true
    local vote = Instance.new("Hint",game.Workspace)
    vote.Text = player.Name.. " has voted"
    game.Debris:AddItem(vote,5)
    debounce = false -- You need to set your debounce back to false again
end)