Loyalty: An agent acts solely for the benefit of the principal, and the agent thereby incurs a duty of loyalty which is imposed on all fiduciaries. An agent cannot enter into a contract with a third party that would create a conflict of interest with the principal.

Obedience and Performance: The relationship between the principal and the agent may be ongoing, and the agent is obligated to comply with the principles reasonable instructions.

Reasonable Care: As well as express or implied contracts with the principal, an agent is also subject to fiduciary obligations imposed by common law and also tort law of negligence as it applies to any transactions.  Section 379 or the Restatement of Agency "Unless otherwise agreed, a paid agent is subject to a duty to the principal to act with standard care and skill...in the locality for the kind of work which he is employed to perform and...to exercise any special skill that he has.

Accounting: What ever an agent receives during and as a result of the agency, the agent holds in trust for the principal. He cannot secretly keep profits from the agency; they belong to the principal.

Information: An agent has a duty to communicate information to the principal even though not instructed to do so.

Duty of Compensation: An agent is entitled to the agreed compensation or the fair value of the agent's services.