The organization must ensure that personal data processed on behalf of a customer is processed only for the purposes expressed in that customer's documented instructions, with the contract stating the objective and time frame of the service, recognising that technical reasons may make it appropriate for the organization to determine the method of processing consistent with general instructions without express direction, and allowing the customer to verify compliance with purpose specification and limitation, which also ensures no data is processed by the organization or its subcontractors for other purposes.
ISO 27701:2019 8.2.2 is one control. If you already hold one of the frameworks below, a reviewed crosswalk already says how much of ISO 27701:2019 your existing evidence covers. Hold SOC 2 and 58 of 108 ISO 27701:2019 controls already carry evidence.
Each report names every control your existing framework evidences, every one it does not, the reasoning behind each claim, and the claims that were argued against and rejected. 289 were rejected on the SOC 2 pair alone.
The graph holds this control, the 0 it maps to, and the evidence behind each claim, over MCP and REST.