Build and sign a mutual-auth certificate identifying an agent or information system. Returns the signed MutualAuthCertificate object ready to carry into a handshake. The issuer's Ed25519 private key (hex) signs over the canonical (JCS) form.
Risk signalsHigh parameter count (13 properties)
Part of the Agent Passport System — Cryptographic Identity for AI Agents server.
Free to start. No card required.
AI agents invoke mutualAuthBuildCertificate to trigger processes or run actions in Agent Passport System — Cryptographic Identity for AI Agents. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
mutualAuthBuildCertificate can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. PolicyLayer enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
{
"version": "1",
"default": "deny",
"tools": {
"mutualAuthBuildCertificate": {
"limits": [
{
"counter": "mutualauthbuildcertificate_rate",
"window": "minute",
"max": 10,
"scope": "grant"
}
]
}
}
}See the full Agent Passport System — Cryptographic Identity for AI Agents policy for all 150 tools.
These attack patterns abuse exactly the kind of access mutualAuthBuildCertificate gives an agent. Each links to the full case and the policy that stops it:
Other execute tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Build and sign a mutual-auth certificate identifying an agent or information system. Returns the signed MutualAuthCertificate object ready to carry into a handshake. The issuer's Ed25519 private key (hex) signs over the canonical (JCS) form.. It is categorised as a Execute tool in the Agent Passport System — Cryptographic Identity for AI Agents MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Register the Agent Passport System — Cryptographic Identity for AI Agents MCP server in PolicyLayer and add a rule for mutualAuthBuildCertificate: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Agent Passport System — Cryptographic Identity for AI Agents. Nothing to install.
mutualAuthBuildCertificate is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the mutualAuthBuildCertificate rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for mutualAuthBuildCertificate. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
mutualAuthBuildCertificate is provided by the Agent Passport System — Cryptographic Identity for AI Agents MCP server (agent-passport-system-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 150 Agent Passport System — Cryptographic Identity for AI Agents tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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