Your Agent (Fiduciary) should be able and willing, first and foremost
Your Agent should also be levelheaded and familiar
A Power of Attorney is a very powerful document
A Power of Attorney can permit your Agent the broadest of powers to do anything that you could have done (i.e., give all your money away). Yet, inherent in the broad powers that your Agent possesses is the possibility - the extremely real possibility - that your Agent under your Power of Attorney may actually do anything that you could have done (i.e., give all your money away).
There are different types of Powers of Attorney
Durable (effective after you are incapacitated and while you are incapacitated)
Current (effective now); or
Springing (effective upon the happening of a future event, i.e., the decision by your doctor that you can no longer act for yourself).
Your Power of Attorney should be HIPAA compliant
Under the HIPAA Privacy Rules, a Power of Attorney that is intended to allow the Personal Representative (Agent) the power to access medical records, to authorize information disclosures, and to participate in medical decisions on behalf of the Principal, but not drafted to allow the Personal Representative (Agent) the "presently effective power" to make health care decisions on behalf of the Principal, may be a technically deficient Power of Attorney. Consequently, the Agent may lack the critical and necessary powers to act on behalf of the Principal in the time of need. For a more detailed explanation, please view the article Powers of Attorney and HIPAA in the Publications section of my Website.
A Power of Attorney does not eliminate your ability to act for yourself
Quite to the contrary, and until you are deemed incapacitated, a Power of Attorney should properly be viewed as a "shared authority."
You still retain all of the powers and your decision making ability that you possessed before you executed the Power of Attorney.