credentials-list

THE RISK

Low Risk

Why credentials-list needs a policy

This tool retrieves and queries credential data associated with an account without modifying, executing, or deleting any information. It falls squarely into the Read category.

From the tool's definition Tool name 'credentials-list' and description 'List all credentials for an account (either as issuer or subject)' indicate data retrieval with no modification or execution. The verb 'list' is characteristic of Read operations.

Documented attack patterns abuse exactly the kind of access credentials-list gives an agent:

POLICY

How to control credentials-list

PolicyLayer is an MCP gateway — it sits between your AI agents and Xrpl mcp, and nothing reaches the server without passing your rules. This is the rule we recommend for credentials-list:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "credentials-list": {}
  }
}

credentials-list is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Xrpl mcp — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about credentials-list

What does the credentials-list tool do? +

List all credentials for an account (either as issuer or subject). It is categorised as a Read tool in the Xrpl mcp MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on credentials-list? +

Register the Xrpl MCP server in PolicyLayer and add a rule for credentials-list: 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 Xrpl mcp. Nothing to install.

What risk level is credentials-list? +

credentials-list is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit credentials-list? +

Yes. Add a rate_limit block to the credentials-list 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 credentials-list completely? +

Set action: deny in the PolicyLayer policy for credentials-list. 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 credentials-list? +

credentials-list is provided by the Xrpl MCP server (romthpt/mcp-xrpl). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Xrpl mcp tool call.

Start from Xrpl mcp, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →