Apperently the realtor would like to put out a fire before it starts ...in theory the agent works for seller...but if agent can jawbone corrections..kiss his or her hand and go for it.
Pumping a septic tells you little..is it a closed or open system? If you don't know the difference and you pour a bunch of caustic dishwasher or toilet cleaners into an open system you will soon get very expensive problems . And to merely pump a tank doesn't tell you if a system works or is up to code OR if seller made any material misrepresentations.
As to roof...I think it on far side of credible for there to be multiple leaks and the owner did not know...It may be about B on the disclosure. What kind of roof..cedar shake on log cabin? Very costly to do cedar right...my across the street neighbor just did his and we compared notes.

