Pete is right, I learned in an Automic Day some while ago that V11 won't have any more variable length limitations (wohoo).
We have a similiar solution where we store escalation / operations relevant settings in the DOCU tab. However I suggest not to place the information there. At least out operations is impacted by irregular data amounts, downtimes/maintenance or temporarily changing handling instructions. I'm now going into a solution where a link is being created onto a Confluence Wiki page (based on the object name). There the operations relevant information is stored and can be changed without changing the AE object (think of change management ;-)). Also people can comment on it etc.