Copilot Studio Connected Agents | Defending Agent-to-Agent Workflows Against UPIA, XPIA and Data Exfiltration | R.A.H.S.I. Framework™ Analysis
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Copilot Studio Connected Agents | Defending Agent-to-Agent Workflows Against UPIA, XPIA and Data Exfiltration | R.A.H.S.I. Framework™ Analysis
Copilot Studio Connected Agents | Defending Agent-to-Agent Workflows Against UPIA, XPIA and Data Exfiltration | R.A.H.S.I. Framework™ Analysis
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Connected agents change the threat model.
In Microsoft Copilot Studio, one agent can call another agent, hand off work, share context, and extend workflows across tools, knowledge, and domains.
That creates scale.
It also creates a new attack path:
Agent-to-Agent trust can become Agent-to-Agent risk.
A parent agent may delegate a task to a connected agent.
That connected agent may have different knowledge, tools, permissions, or data access.
If governance is weak, the handoff itself can become the breach point.
The Risks
1 | UPIA
A malicious user prompt can manipulate the parent agent into calling the wrong connected agent or passing unsafe context.
2 | XPIA
Poisoned retrieved content can influence downstream agent behavior across websites, documents, connectors, or knowledge sources.
3 | Data Exfiltration
Sensitive context can move from one agent boundary to another if handoff rules are not controlled.
4 | Privilege Drift
A connected agent may have access the parent agent should not indirectly use.
R.A.H.S.I. Framework™ View
Secure connected-agent design needs:
Clear delegation rules | Least-privilege agent access | Context minimization | DLP enforcement | Audit logs | Human approval for sensitive actions
Connected agents should be treated like powerful tools.
Every handoff should answer:
Why is this agent being called?
What data is being passed?
What can the connected agent do?
Who can audit the outcome?
The future of enterprise AI will not be one agent.
It will be agent networks.
That means security must defend not only the agent, but also the workflow between agents.
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