"if I click while having tool equipped a bullet flies to wherever my mouse was pointed and damages whoever touches the bullet, bullet gets deleted on touch"

-- local script inside the tool 
local tool = script.Parent
local player = game:GetService("Players").LocalPlayer
local mouse = player:GetMouse()
local shooting = false

local function fireBullet()
    if shooting then return end
    shooting = true

local bullet = Instance.new("Part")
    bullet.Size = Vector3.new(0.5, 0.5, 0.5)
    bullet.BrickColor = BrickColor.new("Bright yellow")
    bullet.Position = player.Character.HumanoidRootPart.Position + Vector3.new(0, 2, 0)
    bullet.Parent = workspace
    bullet.CanCollide = false
    bullet.Anchored = false

local bodyVelocity = Instance.new("BodyVelocity")
    bodyVelocity.MaxForce = Vector3.new(math.huge, math.huge, math.huge)
    bodyVelocity.Velocity = (mouse.Hit.p - bullet.Position).Unit * 100
    bodyVelocity.Parent = bullet

local function onTouched(hit)
        local humanoid = hit.Parent:FindFirstChild("Humanoid")
        if humanoid then
            humanoid.Health = humanoid.Health - 10
        end
        bullet:Destroy()
    end

bullet.Touched:Connect(onTouched)
    wait(0.5)
    shooting = false
end

tool.Activated:Connect(fireBullet)