The organization must identify and document the specific purposes for which personal data will be processed, documented clearly and in enough detail to be usable in the information given to individuals, in obtaining consent, and in the records of policies and procedures, so that individuals understand why their data is processed.
ISO 27701:2019 7.2.1 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.