generatePin · My Credentials MCP Server MCP: Risk & Policy

WHAT IT DOES

What generatePin does on My Credentials MCP Server

AI agents use generatePin 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 generatePin needs a policy

The tool creates new PIN codes (write action), which are credentials used in authentication systems. While not destructive or financial in itself, misuse could enable unauthorized credential generation for account takeover or unauthorized system access.

From the tool's definition Tool name is 'generatePin' and description states it 'Generate[s] numeric PIN codes for authentication and verification systems.' This creates/generates new authentication credentials.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generatePin Rate-limited

generatePin 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": {
    "generatePin": {
      "limits": [
        {
          "counter": "generatepin_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 generatePin

What does the generatePin tool do? +

Generate numeric PIN codes for authentication and verification systems. 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 generatePin? +

Register the My Credentials MCP Server MCP server in PolicyLayer and add a rule for generatePin: 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 generatePin? +

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

Can I rate-limit generatePin? +

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

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

generatePin 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.