With the mission, I mean. You see, there is this C0DA thing in the Elder Scrolls. It gets rather complicated, but, to boil it down, there is no Canon, there is no fanon, all fanfictions are just as valid of interpretations of Mundus as the official Bethesda games. All of them. Let me explain further.
If you are familiar with the Elder Scrolls 3: Morrowind, then you are familiar with the work of one Michael Kirkblade. He is responsible for most of the Elder Scrolls'... weirder aspects. There is a reason I say that Nirn is possibly more developed then the famous Arda. Kirkblade added several metaphysical aspects to his view of the land of Tamriel that shape its unique identity, such as CHIM, (basically the act of transcending and becoming a Buddah) and that all of known reality is a dream.
What does all that have to do with C0DA? Well, Kirkblade also introduced the concept of reincarnation. Not just of a person, but the whole world. Every time the world ends, for one reason or another, it will immediately be reborn, in a new form. Here, we have C0DA. Each person's individual idea as to how the world of the Elder Scrolls works is totally legit with C0DA. It is just one of many cycles, and cannot be dismissed. There are many reasons Kirkblade wanted to do this, partially because he likes open source fiction, partially because he does not like where Bethesda is going with the games and he wanted to stick it to them.
So what does this mean for the PPC? Well, in a way, it makes Elder Scrolls missions impossible. In a way, all fanfic is now canon. Or, well, at least, as Canon as Bethesda's version. Heck, even before this, the Elder Scrolls has been left purposefully open-ended. So much, they introduced Canon plot holes, in the form of Dragon Breaks. This was made in Daggerfall, so that all possible outcomes are Canon at the same time. All of them. It's called the Warp in the West. Major event in Tamriel's history. If you played Skyrim, you have a basic understanding of these Dragon Breaks.
However, if you are insistent, I can think of a few ways it could work. Your agents would have to work as Morag Tong, the assassins of Morrowind. They have legal contracts that allow them to kill in broad daylight. Well, in Morrowind, at least. In Skyrim, they would still be sneaky. However, it is a great excuse for a charge list. Just read the "contract" to the Sue when time to do the deed. Also, you would have to be very sparing in Canon charges. Unless it directly goes against everything that has ever been stated in every Elder Scrolls game, you may have to cut it a little slack. You are, however, allowed to point out how much this C0DA diverged from the commonly accepted one.
I am a bit of a lore nut. If you need help, I can see what I can do to see that your mission stays lore friendly.