Yea but they always end up releasing the modding tools after the modding community has been up and creating mods for months. I'm never really sure how they do it, I just hope there are plenty of mods.
No mod tools to the extent of Skyrim's mod tools were ever released for Far Cry or Far Cry 2. Far Cry 2 had a basic map editor if I recall but it was to make your own maps, not to integrate into the main land. You might see some texture replacement mods, shader replacements, or some cheats, but probably not much else. Far Cry 2 only had 9 mods released according to the moddb.