generate_cuid · Unique Id Generator MCP: Risk & Policy

WHAT IT DOES

What generate_cuid does on Unique Id Generator

AI agents use generate_cuid to create or update resources in Unique Id Generator — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Unique Id Generator environment.

WHY IT NEEDS A POLICY

Why generate_cuid needs a policy

This tool creates new data (unique identifiers) but causes no side effects beyond the generation itself. It does not execute arbitrary code, delete data, or cause financial transactions. The generated IDs are simple strings with no external consequences. Severity is low because misuse would only result in creation of harmless identifier strings, with minimal blast radius or negative impact.

From the tool's definition Tool generates new identifiers (CUIDs) which constitute creation of new data. Description states it "Generate[s] one or more v2 CUIDs" and the server purpose is "generating unique IDs" for when "you need an LLM to create data containing new IDs."

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generate_cuid Rate-limited

generate_cuid 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_cuid": {
      "limits": [
        {
          "counter": "generate_cuid_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 Unique Id Generator, so you can run agents against it safely.

FAQ

Questions about generate_cuid

What does the generate_cuid tool do? +

Generate one or more v2 CUIDs (Collision-resistant Unique Identifiers). CUIDs are 36-characters by default and use Node.js. It is categorised as a Write tool in the Unique Id Generator 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_cuid? +

Register the Unique Id Generator MCP server in PolicyLayer and add a rule for generate_cuid: 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 Unique Id Generator. Nothing to install.

What risk level is generate_cuid? +

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

Can I rate-limit generate_cuid? +

Yes. Add a rate_limit block to the generate_cuid 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_cuid completely? +

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

generate_cuid is provided by the Unique Id Generator MCP server (pyroxin/mcp-server-unique-id-generator). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.