Is Horatio's tone disapproving or approving of Rosencrantz and Guildenstern?

i think that horatio's tone is approval of them, because they did their job which was to transport Hamlet. it doesn't really matter if they knew what the letter said or not they were not working for the purpose of networking they were working for the purpose of money of profit/ employment. So i think that is what horatio is trying to put more emphasis on is that they did what they did for money not for friendship.