Tom and Jerry are (sometime) agents of various organizations.
According to the Tom and Jerry Wiki, Thomas "Tom" Cat is described as a blue/grey anthropomorphic domestic short-haired cat". He has been known to go by the name 'Jasper', at least initially but usually is referred to as Tom.
Jerry Mouse is said, by the same website, to be a "brown house mouse". He, too, is anthropomorphized. While Jerry usually operates alone, he is at times accompanied by a much younger ward, a small grey mouse named Tuffy (sometimes Nibbles) who was left on his doorstep.
Tom and Jerry have a very long history of antagonistic actions against each other quite literally amounting to cat-and-mouse conflicts. They have both shown themselves to be exceptionally clever and resourceful but going on size alone, with Tom being usually six to eight times the size of Jerry, the latter has typically been the better of the two at survival. When you throw in the fact that Jerry is seldom actually going after Tom, in any conflict easy money would be placed on Jerry.
The two have been given membership in this compendium because on several occasions, one or both have taken up assignments for different governmental intelligence organizations OR has walked the other side of the street and has posed a threat to society needing stopping (okay, that would Tom).
The first time came in 1966 when Jerry, designated at Mouse Agent 00 7/8, and ward Tuffy, Mouse Agent 000, are assigned the task of retrieving a "massive block of cheese" resembling a giant bar of gold. It is housed in a large refrigerator in the possession of Tom, then going by the last name of Goldclaw. In this case, Jerry is working for T.R.A.P. which stands for Tiny Radio Auxiliary Police. Jerry is shown sporting a blue fedora, driving a sporty convertible and using a powerful bubble-making ray gun.
The next year sat Jerry is working alone as The Mouse from H.U.N.G.E.R. (no explanation on its full title). He is given the mission to, according to Wikipedia, "infiltrate the mansion of Tom [going by the last name of Thrush] and recover a refrigerator with a large amount of cheese. In this escapade we find Jerry equipped with a large number of cool gadgets and explosives, which he manages to conceal in his trenchcoat only to accidentally destroy them. Jerry again drives a really cool vehicle, this time a tiny dragster with the license plate of "Jerry-Akin 00 1/7".
Three years later, Tom is the lead operative who is working as an "Impossible Agent" complete with being told his next assignment by a self-destructing tape recording. His task is to stop the nefarious activity of a villain called The Spiderman (no relation to Peter Parker) who is minion-ed by Al Babooni. When things get tricky, he must seek the assistance of Jerry and young Tuffy who will become agents themselves.
A year will go by before we again see Tom working as a secret agent, this time using a super-cool motorcycle. His exact mission is unknown except that he will again call upon Jerry and Tuffy to lend assistance.
Then four decades go by and the still remarkably spry fellows are pulled into an escapade helping world-famous Jonny Quest and his pal Hadji, along with their dog Bandit. In this affair, evil Dr. Zin has learned that Jonny's dad, Dr. Benton Quest, has solved the world's energy problem and wants to steal it, using his own feline army.
There may be other, as yet unknown, instances where Tom and Jerry, separately or in tandem, figuratively don cloaks and pick up daggers. Of course, through the many years these two have been active, and there have been a whole lot of them, Tom and Jerry will have had a huge number of adventures, usually against each other but occasionally in a temporary partnership. There are far too many to think of cataloging here so only those known to be about spies are mentioned.