generateUuid · My Credentials MCP Server MCP: Risk & Policy

WHAT IT DOES

What generateUuid does on My Credentials MCP Server

AI agents use generateUuid 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 generateUuid needs a policy

UUID/ULID generation creates new data artifacts that can be persisted in databases or used as identifiers. This is a Write operation (data creation with reversible consequences). Severity is low because UUID generation itself has no destructive side effects—it simply produces identifiers. However, the tool does create data (Write > Read).

From the tool's definition Tool generates unique identifiers (UUID4, ULID) that are created and returned for use in applications. While the name contains 'generate', the description indicates creation of identifier data that will be stored or used.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generateUuid Rate-limited

generateUuid 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": {
    "generateUuid": {
      "limits": [
        {
          "counter": "generateuuid_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 generateUuid

What does the generateUuid tool do? +

Generate universally unique identifiers (UUID4, ULID) for unique identification in applications. 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 generateUuid? +

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

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

Can I rate-limit generateUuid? +

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

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

generateUuid 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.