The organization must have a written contract with every processor it uses and must ensure those contracts address implementation of the appropriate processor controls, requiring the processor to implement them in light of the risk assessment and the scope of processing it performs, with all such controls assumed relevant by default and any decision not to require one justified in the Statement of Applicability, responsibilities being allocable differently between the parties provided every control is considered and documented.
ISO 27701:2019 7.2.6 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.