Restrictions of tool types in 3DX operations

Dear 3DX CAM-Community 
We are hard working to finalize the implementation of a functional interface from our leading tool database TDM-Systems. In our ongoing process we found some incomprehensible restrictions in 3DX milling- and drilling operations. From our side of view the tool type reduction in some operations to just some single tool types don`t make sense. For analyzing our upcoming and growing handicap we are looking for a overview where all existing 3DX operations (milling, drilling, turning..) shows the accepted tool types for generating tool paths from the view of 3DX logic.

Why various restrictions exist would be the follow up question after analyzing.