The analogy of an ESA animal doesn't fit the bill because there are standards and an evidence of data (edit-body of evidenced-based data) a physician can rely upon. It is also within the standard of care and accepted throughout the field that ESAs can help patients with their mental health needs.
With respect, if there are no standards...then of what value is the 'evaluation?'
You're asking the wrong guy cause if there are no standards, you cannot then IMHO accept the mission requested. That is clear someone for something where you do not know what standards must be fulfilled to say the person can be cleared.
I can think of benefits of an evaluation, but they would lead to open-ended evaluations that would not meet the closed-ended request that was made. An evaluation can help the psychiatrist better understand the patient, but unless the conditions were given that could be answered, then you could not answer them.
I wrote this down in a prior thread years back. I've been asked to psychiatrically-clear patients for spinal implant device surgery. I told the patient I knew of no standards upon which I could perform that task. So I called the neurosurgeon to provide me with a list of what satisfies such a clearance. He told me he didn't know and thought all psychiatrist knew to which I told him I've worked with top psychiatrists in the field and none of them know.
So he told me the device's manual says the device requires a mental health professional to provide "clearance." So to help my patient I called up the manufacturer. I told them since you guys put in the requirements, please tell me what must be satisfied to be considered "clearance." The manufacturer told me they didn't know themselves, but put that in the manual to CYA.
A few months later the patient got a surgery and told me the neurosurgeon referred her to a psychologist who wrote the clearance. I called the psychologist and asked him what's the criteria for clearance.
"Listen, I don't know. I do know I got paid a lot of money so I cleared it okay? That's what clears the patient."
Again, if the answer is always 'yes,' and never 'no,' then how is this anything other than an empty, perfunctory, 'responsibility-accepting' ritual on the part of the letter-writer just in case the patient later has second thoughts about the surgery (10 years later, I no longer have my genitalia...I just realized that this is a BIG problem and I wasn't of sound mind when I agreed to this surgery)?
Exactly my point.
I can tell you this. Some places such as Johns Hopkins have studied gender transition surgery so there is a body of data out there and people have studied it, but, and I would tell this to the patient, "In my own defense this is not within the standard of care to know, nor is part of the modern psychiatric training curriculum. This is a specialized set of data that all psychiatrists are not expected to know off-hand, but we are expected to know what is within the standard such as diagnosing and treating more common psychological ailments. I can refer to you to a specialist, but I couldn't do it myself."
A foundation of forensic psychiatric training is do not enter any arena and start a fight where you are not supposed to enter. Do not claim to be an expert without the proper training, authority, and expertise to back it up.