---
title: "Trust tier · Highflame Glossary"
description: "A provenance-based level on an agent's identity (first-party/attested, verified third-party, or unverified) that gates what the agent is eligible for and tightens its policy. It is a verified input to every decision, never a bypass: each action is still authorized per request, so there is no implicit trust."
doc_version: "0.1.0"
last_updated: "2026-07-25T03:14:58.002Z"
canonical: "https://www.highflame.com/glossary/trust-tier"
---

[Home](/index.md)·[Glossary](/glossary.md)·Trust tier

# Trust tier

A provenance-based level on an agent's identity (first-party/attested, verified third-party, or unverified) that gates what the agent is eligible for and tightens its policy. It is a verified input to every decision, never a bypass: each action is still authorized per request, so there is no implicit trust.

Learn more: [Agent Identity](/learn/ai-agent-identity.md)

Part of [the Agent Control Fabric](/platform.md): Highflame's identity, policy, and enforcement substrate for AI agents.

[Book a demo](/contact.md) [All terms](/glossary.md)

## Keep exploring the glossary.

[

### ZeroID

Highflame's open-source agent identity core (Apache 2.0), built on OAuth 2.1, SPIFFE/WIMSE, and RFC 8693: the inspectable foundation beneath Highflame Identity.

Read →](/glossary/zeroid.md)[

### A2A (Agent-to-Agent)

Communication where one agent delegates work to, or calls, another agent. Each hop has to carry identity and narrow scope. Or authority leaks down the chain.

Read →](/glossary/a2a.md)[

### Adaptive guardrails

Runtime controls that tighten themselves as new signals and attack patterns emerge, instead of relying on static rules someone has to keep updating.

Read →](/glossary/adaptive-guardrails.md)[

### Agent Control Fabric

Highflame's term for the identity, policy, and enforcement substrate that governs every agent action at every boundary it crosses: one layer, not a bundle of point tools.

Read →](/glossary/agent-control-fabric.md)[

### Agent governance

Controlling what an organization's agents are allowed to do and proving what they did: discover every agent, authorize each action against policy, and produce audit evidence. Distinct from AI governance's focus on model risk.

Read →](/glossary/agent-governance.md)[

### Agent identity

A verifiable, cryptographic credential issued to an agent that carries agent-shaped claims (owner, trust tier, framework, delegation depth) so every action traces back to a named human.

Read →](/glossary/agent-identity.md)

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