generatePassphrase · My Credentials MCP Server MCP

WHAT IT DOES

What generatePassphrase does on My Credentials MCP Server

AI agents use generatePassphrase 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 generatePassphrase needs a policy

This tool creates new passphrase artifacts as output, making it a Write operation. It has no destructive effects, does not execute external code or commands, and does not move money. Severity is low because passphrase generation is a safe, side-effect-free operation; the generated passphrases are inert data until used elsewhere. The tool is utility-focused and cannot modify existing data or resources.

From the tool's definition Tool generates and returns passphrases (creates data output), described as 'Generate memorable passphrases using dictionary words with customizable word count and separators.' It is a sibling to other 'generate' tools (generatePassword, generatePin,…

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

generatePassphrase Rate-limited

generatePassphrase 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": {
    "generatePassphrase": {
      "limits": [
        {
          "counter": "generatepassphrase_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 generatePassphrase

What does the generatePassphrase tool do? +

Generate memorable passphrases using dictionary words with customizable word count and separators. 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 generatePassphrase? +

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

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

Can I rate-limit generatePassphrase? +

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

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

generatePassphrase 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.