Patrol for Oracle has parameters to monitor space related information and alert when there is low space left or percentage. (SpaceLeft & PctUsed). There is not such parameter specific for the autoextended feature, you will get an alert only when there is low space (default thresholds) or when the configured thresholds are reached.
As far as I know, you want to activate autoextend when there is low space, I am from Customer Support and we never got such a requirement. Here you can find further information about the ETSM monitoring:
If you have a specific need for this, you can create a case with customer Support and request an RFE to be created.
Hope this helps.
BMC Customer Support.
Thanks Manuel for response , just reveiw 00750203 case whenever you find time , You will get the correct answer.