Connected information must retain its ownership, permissions and meaning. Review those boundaries throughout the architecture.

Separate the source identity, derived information and authority to perform an action.
Follow source records, temporary processing and retained derivatives across the proposed architecture.
Review dependency failures, permission changes and incomplete information alongside the successful path.

Source access should be evaluated in the context of the identities, roles and policies that already govern enterprise information. A query, a graph relationship and a workflow action may each have different permission requirements.
Review least privilege, service identities and access controls against the policies in your environment. Source access, derived information and workflow actions need their own authorization decisions.
An evaluation should establish what information is accessed, where it is processed, what is retained and how it is removed. Consider derived data as well as source records: indexes, embeddings, cached queries, logs and screenshots can carry sensitive information.
Document residency constraints and ownership before introducing new data paths. Where an architecture uses access without wholesale replication, review the operational behavior of caches, temporary materialization and downstream processing explicitly.
Security and operations teams agree the evidence required for evaluation, including access decisions, change records, lineage, event traces and recovery procedures.
Discuss availability commitments, contractual terms, subprocessors and supporting assurance documentation with the team as part of your evaluation. Agree on the evidence needed to assess each requirement in the proposed architecture.
Share the policies, threat model and operational controls that a proposed architecture must satisfy. Review authentication, authorization, tenant boundaries, data quality and incident ownership as connected concerns.
The review should cover unavailable dependencies, changed permissions and incomplete information, including who investigates and how the service recovers.