Hello! I want to modify this script so that when you summon NPCS via a tool the said NPCS will fight for you, like the zombie staff

Script:

--Services--
local Players = game:GetService("Players");
local RunService = game:GetService("RunService");
local PathFindingService = game:GetService("PathfindingService");

--Varibles--
local Character = script.Parent;
local Humanoid = Character.Humanoid;
local RootPart = Character.HumanoidRootPart;

local CanJump = true;

local AttackRange = Vector3.new(3,3,3);
local FieldOfView = 70;
local CharacterSize = Character:GetExtentsSize();

local PathParams = {
	AgentRadius = (CharacterSize.X+CharacterSize.Z)/4,
	AgentHight = CharacterSize.Y,
	AgentCanJump = CanJump,
};
--Functions--
local function GetNearestPlayer()
	local players = {};
	local nearest = math.huge;
	local target = nil;
	
	for _, player in pairs(Players:GetPlayers()) do
		local character = player.Character;
		
		if character == nil then
			continue;
		end;
		
		local distance = (character.HumanoidRootPart.Position - RootPart.Position);
		if distance.Magnitude <= FieldOfView then
			table.insert(players,{
				Magnitude = distance.Magnitude,
				Player = player,
			});
		end;
	end;
	for _, entry in pairs(players) do
		local magnitude = entry.Magnitude;
		local Player = entry.Player;
		
		if magnitude < nearest then
			nearest = magnitude;
			target = Player;
		end;
	end;
	
	return target;
end
--Connections--
RunService.Heartbeat:Connect(function()
	local player = GetNearestPlayer();
	
	local player_character = player.Character;
	
	if player_character == nil then
		return;
	end;
	
	local Character_Humnoid = player_character.Humanoid
	if Character_Humnoid.Health <= 0 then
		return;
	end;
	
	local Target_RootPart = player_character.HumanoidRootPart;
	
	local Destination = Target_RootPart.Position;
	local Beginning = RootPart.Position;
	
	local path = PathFindingService:CreatePath(PathParams);
	path:ComputeAsync(Beginning,Destination);
	
	if path.Status == Enum.PathStatus.Success then
		local Waypoints = path:GetWaypoints();
		
		for _, Waypoint in pairs(Waypoints) do
			if Waypoint.Action == Enum.PathWaypointAction.Jump then
				Humanoid.Jump = true;
			end;
			
			Humanoid:MoveTo(Waypoint.Position);
			Humanoid.MoveToFinished:Wait();
		end;
	else
		Humanoid:MoveTo(RootPart.Position);
	end;
end);

--Initilization--
RootPart:SetNetworkOwner(nil);
Anonymous