generate_key_pair · PKI Studio MCP: Risk & Policy

WHAT IT DOES

What generate_key_pair does on PKI Studio MCP

AI agents use generate_key_pair to create or update resources in PKI Studio MCP — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your PKI Studio MCP environment.

WHY IT NEEDS A POLICY

Why generate_key_pair needs a policy

This tool creates and returns sensitive cryptographic key material (both private and public keys). While key generation itself is not inherently destructive or executing external commands, it produces new cryptographic artifacts that will be written to storage or used in subsequent operations. This is a Write operation because it creates reversible data (keys can be regenerated).

From the tool's definition Tool description states it will 'Generate a key pair and return the private key as PKCS#8 DER and public key as SPKI DER', which creates cryptographic material that can be stored and used.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_key_pair Rate-limited

generate_key_pair stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "generate_key_pair": {
      "limits": [
        {
          "counter": "generate_key_pair_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about generate_key_pair

What does the generate_key_pair tool do? +

Generate a key pair and return the private key as PKCS#8 DER and public key as SPKI DER. It is categorised as a Write tool in the PKI Studio MCP MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generate_key_pair? +

Register the PKI Studio MCP server in PolicyLayer and add a rule for generate_key_pair: 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 PKI Studio MCP. Nothing to install.

What risk level is generate_key_pair? +

generate_key_pair is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit generate_key_pair? +

Yes. Add a rate_limit block to the generate_key_pair 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 generate_key_pair completely? +

Set action: deny in the PolicyLayer policy for generate_key_pair. 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 generate_key_pair? +

generate_key_pair is provided by the PKI Studio MCP server (pkistudio/pkistudiomcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.