Adding the ore dictionary 'ore:rockLimestone' to limestone rocks and any recipes that uses them would increase compatibility with mods.
One example being that TerraFirmaCraft limestone rocks would be use able to produce crushed limestone.

Optional addition
TerraFirmaCraft adds 'ore:rockFlux' to limestone and other "flux containing rocks", for compatibility reasons an ore dictionary addition to limestone rocks would be nice, and if ever added in the future, dolomite, marble and chalk rocks.