T-1006ObservedActive

Agent Card Discovery

Discover A2A agent cards to map agent identities, capabilities, and trust relationships

Tactic

Reconnaissance · Stage 1

Map the target agent's attack surface, capabilities, and behavioral boundaries

Attack class

AGENT-IMPERSONATE

Impersonating trusted agents or administrative roles to gain unauthorized access

Evidence grade
Observed

Confirmed in real-world production systems or internet-wide exposure assessments.

DVAA validation

Orchestrator /a2a/agent-card

Reproductions in Damn Vulnerable AI Agent, the OpenA2A intentionally-broken agent for kill-chain validation.

Honeypot

AgentPwn coverage

Queued

In scope for honeypot observation; trap page or telemetry hook not yet built.

A2A agent-card discovery needs the fake-agent network at /pwnagent, which is queued.

Detect

Detection · HackMyAgent

Queued0 live · 2 queued
A2A-001A2A-002
npx hackmyagent secure --ciLive = implemented in hackmyagent; queued = declared
Defend

Defense · OASB controls

Live4 live · 0 queued
Live = documented at oasb.ai; queued = declared
Reference

How to cite

AI Agent Threat Matrix T-1006 (Agent Card Discovery). OpenA2A, 2026. https://threats.opena2a.org/techniques/T-1006