What is Real-Time Policy Evaluation?

1 min read Updated

Checking an agent's transaction against all rules at request time — before signing. Decisions in milliseconds for immediate allow/deny.

WHY IT MATTERS

Post-transaction monitoring can't prevent losses — funds are gone. Real-time evaluation shifts to before signing, the only point where you can stop a bad transaction.

Must be fast. Agents operate at machine speed; seconds of latency is impractical. Modern engines handle complex rules in under 10ms.

Real-time means real-time context — cumulative spending, recent patterns, and active session parameters inform each decision.

HOW POLICYLAYER USES THIS

PolicyLayer evaluates every transaction in real-time before signing. Sub-10ms latency doesn't bottleneck operations.

FREQUENTLY ASKED QUESTIONS

What happens during evaluation?
PolicyLayer checks the transaction against all applicable rules: amount limits, recipient allowlists, velocity checks, gas policies, and session constraints. All in parallel.
Can evaluation be async?
For HITL flows, yes — the evaluation returns a 'pending human review' status. For auto-approve/deny, it's synchronous and instant.
What if PolicyLayer is unavailable?
Configurable: fail-closed (block all transactions until restored) or fail-open (allow transactions unchecked). Most operators choose fail-closed for security.

FURTHER READING

Enforce policies on every tool call

Intercept is the open-source MCP proxy that enforces YAML policies on AI agent tool calls. No code changes needed.

npx -y @policylayer/intercept
github.com/policylayer/intercept →
// GET IN TOUCH

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