Electronic Arts has released guidelines for what kinds of content the community can create using the new SimCity mod tools. To say that these rules put limits on the creativity of the community is probably an understatement. According to EA's guidelines the community is basically limited to cosmetic changes, such as reskins of buildings.
One of the rules states that modders can't create mods that "jeopardize the integrity of the gameplay or harm the experience of others." Another overbroad guideline says that mods can not affect "multiplayer games and multiplayer features, such as leaderboards or trading with other players."
Still another rules states that mods cannot modify "any .com, .exe, .dll, .so or other executable files."
The rules also prevent players from creating an offline-only single-player version of the game..
To say that community reaction to the rules has been negative is the first understatement of 2014.
We will have more on this story as it develops.
You can read responses to these rules here.