In truth, Kazemori Masaki was somewhat hesitant about whether to use this mission to Qian Kinkaku and Ginkaku, nipping their future rebellion in the bud.
This should not have required any hesitation, but Masaki felt that Kinkaku and Ginkaku's rebellion was not entirely a bad thing. Once the two countries formed an Alliance, the Kumogakure Ninja Shinobi Village could end the war without further draining its strength. For Konoha Ninja Village, that was hardly good news: a militaristic Shinobi Village that retained its strength would still pose a considerable threat. Yet it was not entirely bad news either, since Konoha Ninja Village could also withdraw from the Kumogakure front.
To maximize their gains, Masaki thought allowing Kinkaku and Ginkaku to rebel would be the better choice. The rebellion the brothers sparked would inevitably plunge the Kumogakure Ninja Shinobi Village into civil war, weakening it further. Konoha Ninja Village could also use the opportunity to help suppress the rebellion as a pretext to interfere in the Kumogakure Ninja Shinobi Village's internal affairs.
In his heart, Masaki leaned toward letting Kinkaku and Ginkaku rebel, but he feared the plan might backfire and leave Tobirama dead, just as in the manga. Although he already knew the brothers were certain to rebel, meaning Tobirama would not be entirely unprepared, he still worried.
Besides, Masaki was only somewhat confident that he could Qian both Kinkaku and Ginkaku during this mission. As he had said, he would either have to Qian both before they could use their tailed beast power, or kill neither. If even one of them unleashed the Nine-Tails' chakra and entered the second stage of tailed beast transformation, he would be beyond Masaki's ability to defeat.
At the Alliance ceremony between the two countries, on the other hand, both the Second Raikage and