kya_cert_verify · UMBRAXON/kya Hub MCP: Risk & Policy

WHAT IT DOES

What kya_cert_verify does on UMBRAXON/kya Hub

AI agents invoke kya_cert_verify to trigger actions in UMBRAXON/kya Hub. What it does depends on the arguments the agent supplies, and its effects often reach beyond the immediate call — builds kicked off, notifications sent, workflows started.

WHY IT NEEDS A POLICY

Why kya_cert_verify needs a policy

The tool submits a POST request to an external API endpoint to verify a certificate payload. While the server is described as read-only and the operation is a verification check (no data modification), it triggers an external HTTP operation whose behavior depends on the supplied certificate argument.

From the tool's definition POST /api/cert/verify with { certificate } object (KYA VC JSON)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

kya_cert_verify Rate-limited

kya_cert_verify stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "kya_cert_verify": {
      "limits": [
        {
          "counter": "kya_cert_verify_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

RATE-LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches UMBRAXON/kya Hub, so you can run agents against it safely.

FAQ

Questions about kya_cert_verify

What does the kya_cert_verify tool do? +

POST /api/cert/verify with { certificate } object (KYA VC JSON). It is categorised as a Execute tool in the UMBRAXON/kya Hub MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on kya_cert_verify? +

Register the UMBRAXON/kya Hub MCP server in PolicyLayer and add a rule for kya_cert_verify: 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 UMBRAXON/kya Hub. Nothing to install.

What risk level is kya_cert_verify? +

kya_cert_verify is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit kya_cert_verify? +

Yes. Add a rate_limit block to the kya_cert_verify 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.

How do I block kya_cert_verify completely? +

Set action: deny in the PolicyLayer policy for kya_cert_verify. 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.

What MCP server provides kya_cert_verify? +

kya_cert_verify is provided by the UMBRAXON/kya Hub MCP server (umbraxon/kya-hub). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.