◎ Platform · Protocol Security · A2A Security

Verified agent identity. Ensure every agent action remains accountable.

Identity, scope, and audit across every A2A handoff

Agent-to-Agent communication is how modern agentic systems scale. This agent to agent delegation of work across systems induces security challenges. Identity can become unclear, scope can expand without authorization, and accountability can break down entirely. Trust3 AI secures every A2A handoff with verified identity, bounded scope, protected data transfer, and full traceability across every step.

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THE CHALLENGE

Delegation without verification is a new attack surface.

When one agent delegates to another, three questions matter: who the receiving agent is, what it is allowed to do, and where accountability sits if something goes wrong. Most A2A protocols don’t answer these reliably. Without verified identity and bounded scope, delegation becomes privilege escalation. Without end-to-end traceability, even simple multi-hop actions turn into forensic investigations instead of clear audit records.

THE SOLUTION

Identity, scope, and audit across every A2A handoff

Trust3 AI secures Agent-to-Agent communication so you can scale agentic systems without losing control of identity, scope, or accountability. It enforces verified identity at every handoff, applies strict scope boundaries to prevent unauthorized access, and protects sensitive data as it moves across agents and systems. Every action is fully traceable end to end, so you always know who did what, with what permissions, and where it happened.

KEY CAPABILITIES

Core capabilities

01
Agent Identity Verification

Only verified agents can participate in delegation

You don’t want work flowing to agents you can’t trust or properly identify. Trust3 AI verifies both the delegating and receiving agent before any A2A handoff, blocking shadow agents, unregistered identities, and credential mismatches at the protocol layer so unverified agents never receive work. Every verification is logged with both agent identities, timestamp, and outcome, giving you clear visibility into who handed off work and who received it.

02
Scope Inheritance & Bounding

Delegation stays within declared intent

When agents delegate work, scope must stay within clear boundaries. Trust3 AI enforces this by making the receiving agent inherit the delegating agent’s declared purpose as the ceiling, then applying additional role-based restrictions at every hop in the chain so scope can only narrow, never expand. Any attempt to access resources outside the allowed scope is blocked and logged, ensuring consistent enforcement across every multi-agent workflow.

03
Automatic PII, PCI, and PHI Redaction

Sensitive data doesn’t travel unnecessarily

A2A messages often carry more data than they should. Trust3 AI scans every outbound message in real time and redacts sensitive data like PII, PCI, and PHI before it reaches the next agent, or blocks the message entirely if the content isn’t justified by the receiving agent’s scope. Every redaction and block is logged with full context so you know exactly what was removed, why, and where it was sent.

04
Delegation Chain Traceability

Every hop becomes one audit record

Multi-agent workflows get complex quickly, especially when something goes wrong. Trust3 AI records the full delegation chain—from orchestrator to worker—including every A2A handoff, tool call, and policy decision so you can see exactly where and why something happened. Everything is tied into a single traceable record across the entire chain, allowing you to pinpoint issues in seconds instead of rebuilding the story manually.

  • Tool calls within each delegated task captured as part of the chain trace
  • Policy evaluation results (which policy fired, what decision was reached) recorded at each hop
  • A2A handoffs, MCP tool calls, and direct LLM interactions in a single correlated trace
  • One click from any issue to the full chain of evidence
05
Reputation-Aware Routing

Trust Score shapes every delegation

Not all agents should operate with equal trust in a live system. Trust3 AI evaluates Trust Scores before every delegation, tightening permissions for lower-trust agents and blocking high-risk workflows when needed, and if a Trust Score drops mid-task, execution can pause and escalate to human review. Every routing decision is logged with the Trust Scores at the moment it was made, giving you adaptive control that responds as agent behavior changes.

Delegation is how agentic systems scale. Trust3 AI makes sure identity scales with it.

Every A2A handoff is a moment where identity can dissolve, scope can expand, and accountability can disappear. Trust3 AI makes it a verified, bounded, and fully traceable act instead.

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