# SPIFFE / WIMSE

Open standards for verifiable workload identity. Highflame extends them with agent-shaped claims for delegation, trust, and attribution.

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

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

## Keep exploring the glossary.

**Tool poisoning** 
Hiding malicious instructions in an MCP server or tool description so an agent executes them when it loads or calls the tool. Invisible to static config; caught by scanning tools before load and enforcing at the call.
Read → [Tool poisoning](/content/glossary/tool-poisoning/index.html)

**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.
Read → [Trust tier](/content/glossary/trust-tier/index.html)

**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 → [ZeroID](/content/glossary/zeroid/index.html)

**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 → [A2A](/content/glossary/a2a/index.html)

**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 → [Adaptive guardrails](/content/glossary/adaptive-guardrails/index.html)

**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 → [Agent Control Fabric](/content/glossary/agent-control-fabric/index.html)