As the name suggests, you play a MySim (whose appearance you customise at the start) who wants to be a special agent. Starting off as a minor detective, as the game progresses and you solve more cases you can eventually develop a huge secret agency tasked with saving the world.
PBG says some things, and then MySims Agents happens.
Gamertell has posted a positive review of EA's MySims Agents for Wii.
From the review:
"While both prior MySims games were straightforward simulation and adventure games, where you'd need to create building and furniture on request, MySims Agents breaks away from the simulation elements and is strictly an adventure game. After playing, I'm pleasantly surprised and would consider MySims Agents my favorite entry in the series."
About writes: "Kid's games. For me, the phrase brings to mind tedious exercises in bland, cloying dialogue, nonsensical stories and dumbed-down, poorly implemented gameplay; games no one over ten could enjoy. But sometimes, just sometimes, a game aimed at children is just plain fun. Such is the case with MySims Agents."