agent-card-signing-auditor
Helps audit Agent Card signing practices in A2A protocol implementations. Identifies missing signatures, weak signing schemes, and revocation gaps that allow impersonation in agent-to-agent trust handshakes.
Install via CLI (Recommended)
clawhub install openclaw/skills/skills/andyxinweiminicloud/agent-card-signing-auditorWhat This Skill Does
The agent-card-signing-auditor is a critical security utility designed for developers and system administrators working within the A2A (Agent-to-Agent) protocol. As the A2A ecosystem grows, the prevalence of malicious actors exploiting the "optional" nature of Agent Card signatures has increased. This skill provides an automated audit framework to evaluate the integrity and authenticity of Agent Cards. By verifying the presence, strength, and provenance of digital signatures, it helps mitigate risks associated with identity spoofing, unauthorized capability claims, and impersonation attacks. It is an essential tool for any environment where agent-to-agent trust is a prerequisite for sensitive operations.
Installation
To install this skill, run the following command in your terminal within the OpenClaw environment:
clawhub install openclaw/skills/skills/andyxinweiminicloud/agent-card-signing-auditor
Use Cases
- Security Auditing: Periodically scan your deployed agent ecosystem to ensure all registered agents adhere to strict cryptographic signing standards.
- Trust Handshake Validation: Integrate this auditor into your middleware to verify the legitimacy of external agents before authorizing them to perform actions within your system.
- Compliance Checks: Ensure your development team follows the mandated security posture by flagging any Agent Cards that omit signatures or use legacy/deprecated signing algorithms.
- Threat Hunting: Identify potentially spoofed agents in a decentralized network by cross-referencing signing keys against known trusted registries.
Example Prompts
- "Analyze all registered Agent Cards in the current directory and generate a report on which ones are missing digital signatures."
- "Audit the signing algorithm for the agent with ID 'FinanceBot-09' and verify if it meets the Ed25519 standard."
- "Check the current Agent Card for 'InventoryManager' for revocation status and confirm if its public key is present in the approved JWKS endpoint."
Tips & Limitations
- Transparency is Key: Always ensure your signing keys are published to a verifiable transparency log. The auditor can only verify what it can publicly reference.
- Algorithm Currency: Cryptographic standards evolve rapidly. Regularly update the auditor to ensure it remains aware of newly deprecated or vulnerable signing schemes.
- Scope: Note that this skill audits the signing mechanism itself. It does not evaluate the internal code logic of the agents it audits, nor does it guarantee the agent's behavior remains benign after the initial handshake verification.
Metadata
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Find the right skillPaste this into your clawhub.json to enable this plugin.
{
"plugins": {
"official-andyxinweiminicloud-agent-card-signing-auditor": {
"enabled": true,
"auto_update": true
}
}
}Tags(AI)
Flags: code-execution
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