Tool = script.Parent
	function onEquippedLocal()
		    local humanoid = Tool.Parent:FindFirstChild("Humanoid")
	humanoid.MaxHealth = humanoid.MaxHealth + 25
	humanoid.Health = humanoid.health + 25
	end
	 
	function onUnequippedLocal()
		    local Player = Tool.Parent.Parent
		    local Character = Player.Character or Player.CharacterAdded:Wait()
	local Humanoid = Character:WaitForChild("Humanoid")
	
	Humanoid.MaxHealth = 100
	Humanoid.TakeDamage = 25
		    
		end
	 
	-- Use 'Connect' as 'connect' is deprecated.
	Tool.Equipped:Connect(onEquippedLocal)
	Tool.Unequipped:Connect(onUnequippedLocal)

the humanoid doesnt take 25 dmg but the max health get set to be 100

Anonymous