I amde a Gate and You Need a Shirt to Pass it , How can I make it so I need A Tool?

--[[
	
	boardingHandler
	@author Jhxan	
	
--]]
math.randomseed(tick())

--> variables
local rf = game:GetService("ReplicatedStorage"):WaitForChild("boardingRF")
local re = game:GetService("ReplicatedStorage"):WaitForChild("boardingRE")
local httpKey = "key-"..math.random(1, 345894)

local scanners = {}
local onStatuses = {}

local ecShirtId = 0
local bcShirtId = 0
local fcShirtId = 0


--> functions

local function getScanners()
	for i,instance in pairs(game:GetService("Workspace"):GetDescendants()) do
		if instance.Name == "boardingSystem" and instance:IsA("Model") then
			table.insert(scanners, instance)
		end
	end
end

local function setStatuses()
	for i,scanner in pairs(scanners) do
		local data = {
			model = scanner;
			ecOn = false;
			bcOn = false;
			fcOn = false;
		}
		table.insert(onStatuses, data)
	end
end

local function setStatus(name, value, model)
	for i,status in pairs(onStatuses) do
		if status.model == model then
			status[name] = value
			print("set status: "..tostring(name).. " | " ..tostring(value))
		end
	end
end

local function getStatuses(model)
	for i,status in pairs(onStatuses) do
		if status.model == model then
			return status
		end
	end
end

local function ownsClass(usr, class)
	if class == "EC" then
		if ecShirtId ~= 0 then
			return game:GetService("MarketplaceService"):PlayerOwnsAsset(usr, ecShirtId)
		else
			return true
		end
	end
	
	if class == "BC" then
		if bcShirtId ~= 0 then
			return game:GetService("MarketplaceService"):PlayerOwnsAsset(usr, bcShirtId)
		else
			return true
		end
	end
	
	
	if class == "FC" then
		if fcShirtId ~= 0 then
			return game:GetService("MarketplaceService"):PlayerOwnsAsset(usr, fcShirtId)
		else
			return true
		end
	end
	
end

local function toggleScanners(scanner, value)
	if value == true then
		-- open scanners
		scanner:WaitForChild("leftOpener").CanCollide = false
		scanner:WaitForChild("rightOpener").CanCollide = false
		scanner:WaitForChild("leftOpener").Transparency = 1
		scanner:WaitForChild("rightOpener").Transparency = 1
	else
		-- close scanners
			scanner:WaitForChild("leftOpener").CanCollide = true
		scanner:WaitForChild("rightOpener").CanCollide = true
		scanner:WaitForChild("leftOpener").Transparency = 0
		scanner:WaitForChild("rightOpener").Transparency = 0
	end
end

local function setupScanners()
	for i,scanner in pairs(scanners) do
		scanner:WaitForChild("detectPart").Touched:connect(function(part)
			local hum = part.Parent:FindFirstChild("Humanoid")
			if hum then
				local plr = game:GetService("Players"):GetPlayerFromCharacter(part.Parent)
				if plr then
					-- is plr
					local model = scanner
					local currentStatus = getStatuses(model)
					if currentStatus.ecOn == true then
						-- ec open
						if ownsClass(plr, "EC") then
							toggleScanners(scanner, true)
							wait(0.5) -- wait 0.5 seconds
							toggleScanners(scanner, false)
						end
					end
					
					if currentStatus.bcOn == true then
						-- bc open
						if ownsClass(plr, "BC") then
							toggleScanners(scanner, true)
							wait(0.5) -- wait 0.5 seconds
							toggleScanners(scanner, false)
						end
					end
					
						if currentStatus.fcOn == true then
						-- fc open
						if ownsClass(plr, "FC") then
							toggleScanners(scanner, true)
							wait(0.5) -- wait 0.5 seconds
							toggleScanners(scanner, false)
						end
					end
					
				end
			end
		end)
	end
end

--> events
rf.OnServerInvoke = function(usr, event, key, ...)
	local args = {...}
	
	-- key not required
	if event == "getKey" then
		return httpKey
	end
	
	if event == "getBoardingStatus" then
		return getStatuses(args[1])
	end
	
	if event == "setBoardingStatus" then
		setStatus(args[1], args[2], args[3])
	end
	
	
	
	-- key required
	if key == httpKey then
	else
		usr:Kick("evm")
	end
		
end

--> scripting
getScanners()
setStatuses()
setupScanners()

Also , The Gate also got a Screen where you can activate the Classes FC , BC , EC

Try this:

while game:WaitForChild(game.Workspace.boardingSystem) do
	local p = game.Players:GetPlayerFromCharacter(game.Workspace.boardingSystem)
	if p then
		if p.Backpack:FindFirstChildWhichIsA("Tool") ~= nil then
			game.Workspace.boardingSystem.CanCollide = false
		end
	end
	wait()
end

Put it at line 89 in your code and see if it works.