Client-Server question

Help and Feedback Scripting Support
#1

Hello so, i’m creating a gun for my map, but i have doubts about Client and Server.
For example: in the video below I use the weapon against a TestHumanoid, but the script that applies damage to Humanoid is in a LocalScript:


script:

--LocalScript in Gun
local player = game.Players.LocalPlayer
local mouse = player:GetMouse()

local tool = script.Parent

local bullets = player.PlayerGui:WaitForChild("GunGui"):WaitForChild("Bullets")
local shotsound = tool.Gunfire

tool.Equipped:Connect(function()
	bullets.Visible = true
	mouse.Icon = "rbxgameasset://Images/Icon"
	tool.Activated:Connect(function()
		shotsound:Play()
		print(mouse.Target)
	
		if mouse.Target then
		if mouse.Target.Parent:FindFirstChild("Zumanoid")then
			mouse.Target.Parent:FindFirstChild("Zumanoid"):TakeDamage(5)
		elseif mouse.Target.Parent.Parent:FindFirstChild("Zumanoid") then
			mouse.Target.Parent.Parent:FindFirstChild("Zumanoid"):TakeDamage(5)
		end
		end
	end)
	
	tool.Unequipped:Connect(function()
		bullets.Visible = false
		mouse.Icon = ""
	end)
	end)

Notice that for the server TestHumanoid also died
My question is: Why did the Humanoid Test also die to the server if it happened only on the client? (LocalScript)