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Without governed agent-to-agent interaction, every delegation is a risk. We build an A2A layer into your system that turns agent discovery, trust negotiation, and delegation into a policy-governed protocol — auditable, reversible, and as restrictive as your security posture demands.
The A2A policy layer sits between every agent interaction. It runs before any delegation happens, and it logs every decision — allowed or denied — to a record your team can audit.
Read the protocol docs ↗At startup, every agent registers with the A2A discovery registry — declaring what it can do, what it's allowed to delegate to, and under what trust conditions. The registry does not accept self-signed claims.
When an agent needs a capability it doesn't own, the discovery protocol resolves the best available candidate from the registry — filtering by capability, availability, and trust tier. The requesting agent never hard-codes a target.
Before any delegation reaches the target agent, the policy gate intercepts and evaluates it: Is the target on the requester's allowed-delegate list? Does the task scope match the target's declared capabilities? Has the rate limit been exceeded? Are all guardrails satisfied?
The gate's decision is binary and final at this boundary. An ALLOW passes the request to the target agent with a signed delegation token scoped to the approved task. A DENY returns a structured error; the requesting agent must handle it, not retry around it.
Whether allowed or denied, every delegation decision is written to the audit log with the full context: requesting agent identity, target, task scope, policy evaluated, timestamp, and outcome. The log is append-only and tamper-evident.
A compromised agent cannot pivot to other agents outside its declared policy scope. Every delegation boundary is enforced — not just logged after the fact. The damage a rogue or misconfigured agent can do is structurally bounded at the policy layer.
Every agent interaction has a policy scope you wrote and can read. You know exactly which agents are allowed to talk to each other, under what conditions, and at what rates — before anything runs. The system is auditable from the design phase, not just in production.
Every delegation decision — allowed or denied — is written to an append-only, tamper-evident log with full context. Compliance teams can reconstruct any agent interaction. Forensic analysis doesn't require tracing through application logs.
The gate returns a structured denial. The requesting agent receives a policy violation error with a machine-readable reason code. It is the requesting agent's responsibility to handle the denial — retry with a narrower scope if the policy allows, escalate to a human, or fail gracefully. The gate never silently drops requests.
Yes. Policies are evaluated at delegation time, not at agent startup. You can update a policy — tighten a rate limit, add a guardrail, revoke a delegation target — and the change takes effect on the next delegation request without restarting any agent. Policy versions are tracked; you can see exactly which version of a policy governed any past decision.
RBAC and ABAC govern what a human identity or service account can do. A2A policy governs what one agent can ask of another agent — a delegation relationship, not a resource access check. The concepts are complementary: Agent Security handles identity and resource permissions; A2A Policy handles the inter-agent trust and delegation layer above that.
Trust negotiation is the process by which two agents establish the scope of a delegation before the work begins. Agent A presents its capability certificate; Agent B presents its acceptance criteria; the policy gate mediates. The outcome is a scoped, time-limited delegation token that both agents and the governing system accept as proof of authorized interaction.
Yes. The policy language supports custom predicates alongside the built-in controls (trust scope, capability, rate limit, guardrails). You can write rules like "this agent may only delegate to agents in the same deployment region" or "delegation requires a human approval token attached to the request." Custom rules are evaluated in the same gate with the same audit trail.
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