๐ง๐ฟ๐๐๐ ๐๐ผ๐๐ป๐ฑ๐ฎ๐ฟ๐ | ๐ง๐ต๐ฒ ๐๐ป๐๐ฒ๐ฟ๐ณ๐ฎ๐ฐ๐ฒ ๐๐ ๐ก๐ผ๐ ๐๐ต๐ฒ ๐ฆ๐ฒ๐ฐ๐๐ฟ๐ถ๐๐ ๐๐ผ๐๐ป๐ฑ๐ฎ๐ฟ๐ | ๐ฅ.๐.๐.๐ฆ.๐. ๐๐ฟ๐ฎ๐บ๐ฒ๐๐ผ๐ฟ๐ธโข
๐ง๐ต๐ฒ ๐ถ๐ป๐๐ฒ๐ฟ๐ณ๐ฎ๐ฐ๐ฒ ๐ถ๐ ๐ป๐ผ๐ ๐๐ต๐ฒ ๐๐ฒ๐ฐ๐๐ฟ๐ถ๐๐ ๐ฏ๐ผ๐๐ป๐ฑ๐ฎ๐ฟ๐.
An agent appears on a SharePoint page. For the documented Copilot Studio SharePoint knowledge-source option, content is trimmed to the signed-in userโs permissions. That is a legitimate control.
Now suppose the agent invokes a tool connected to another business system. Which identity does that system evaluate? Which permission authorizes its action? The page cannot answer either question.
๐๐ผ๐๐ฟ ๐ฏ๐ผ๐๐ป๐ฑ๐ฎ๐ฟ๐ถ๐ฒ๐ ๐๐ผ ๐บ๐ฎ๐ฝ:
- Presentation: Where did the interaction appear?
- Identity: Who or what acted?
- Authorization: What could that principal do?
- Trust: Where did data, authority or execution cross domains?
๐๐ต๐ฒ๐ฐ๐ธ ๐๐ต๐ฒ ๐ฐ๐ผ๐ป๐ป๐ฒ๐ฐ๐๐ถ๐ผ๐ป.
A Copilot Studio tool can require user authentication or use credentials supplied for the agent to act on the userโs behalf. Whose authority does the destination evaluate? What operation can it perform, and where can it be blocked?
Environments, Entra agent identities, data policies, tool authentication and destination permissions are distinct governance layers. Shared interface does not imply shared trust.
Proposed R.A.H.S.I. Trust-Boundary Map records the surface; user and agent identities; environment; knowledge and tools; connector identity and authentication mode; APIs and destinations; data classification; policy, network and approval boundaries; actions; audit sources; owner; and risks.
It is an architecture artifact, not a native product object.
Zero Trust must follow execution, not pixels. For Reconstructable AIโข, preserve evidence of the initiating user, acting identity, connection, permission, policy decision, destination and action.
Article #42 asked, โWhat happened after the click?โ Article #43 asks, โWhere did identity, authorization and trust change?โ
If the interface disappeared tomorrow, would the security architecture still make sense?
The visible interface is the front door. The trust boundary is the entire building. The interface is not the security boundary.
| R.A.H.S.I. Frameworkโข
๐ก๏ธ Need implementation, not just insights?
Map one agentโs acting identities, connections and destination permissions before treating its host page as its security model.
๐ก๏ธ Article Link | https://www.aakashrahsi.online/post/trust-boundary
๐ก๏ธ Letโs Connect | https://www.aakashrahsi.online/hire-aakash-rahsi

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