generateNanoId · My Credentials MCP Server MCP

WHAT IT DOES

What generateNanoId does on My Credentials MCP Server

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

WHY IT NEEDS A POLICY

Why generateNanoId needs a policy

This tool creates/generates new identifier data (Nano IDs) which is a reversible write operation. It does not execute arbitrary code, delete data, or move money. The blast radius of misuse is minimal—generated IDs can be discarded or overwritten. Low severity because identifier generation alone has minimal security impact unless those IDs are subsequently used maliciously elsewhere in the system.

From the tool's definition Tool generates unique identifiers (Nano ID) with customizable length. The description indicates this creates new data/identifiers rather than reading, executing code, or causing destructive operations.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generateNanoId Rate-limited

generateNanoId 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": {
    "generateNanoId": {
      "limits": [
        {
          "counter": "generatenanoid_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 My Credentials MCP Server, so you can run agents against it safely.

FAQ

Questions about generateNanoId

What does the generateNanoId tool do? +

Generate URL-safe unique string identifiers (Nano ID) with customizable length. It is categorised as a Write tool in the My Credentials MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on generateNanoId? +

Register the My Credentials MCP Server MCP server in PolicyLayer and add a rule for generateNanoId: 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 My Credentials MCP Server. Nothing to install.

What risk level is generateNanoId? +

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

Can I rate-limit generateNanoId? +

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

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

generateNanoId is provided by the My Credentials MCP Server MCP server (preangelleo/my-credentials-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.