As a former disability examiner, I can tell you that the process does not rely just on your medical records. Examiners try to categorize the type of work you have done in the past to see if you can return to it, and also to see if you have skills that would transfer to some other type of work. This is why it is very important to provide accurate and detailed descriptions of your past work.
#howdoessocialsecuritydecideifyoucannotwork
Full page: How does social security decide whether your can work or not?.
I am a former disability examiner and I publish the website Social Security Disability Resource Center, or SSDRC for short. I also maintain a facebook page for SSDRC (Social Security Disability Blog).
Neither this blog, nor the facebook page, nor my website are affiliated with the Social Security Administration.