get-nft-metadata

THE RISK

Low Risk

Why get-nft-metadata needs a policy

This tool queries and retrieves NFT metadata from the XRP Ledger without modifying, deleting, or executing any transactions. It is a read-only operation that returns information about NFT collections and tokens, consistent with the Read category for data retrieval operations.

From the tool's definition Tool is named 'get-nft-metadata' and described as 'Get NFT collection and token metadata'. The verb 'Get' and the phrase 'metadata' indicate a retrieval operation with no side effects.

Documented attack patterns abuse exactly the kind of access get-nft-metadata gives an agent:

POLICY

How to control get-nft-metadata

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 get-nft-metadata:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get-nft-metadata": {}
  }
}

get-nft-metadata 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 →

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EXPLORE

Related tools and policies

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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 get-nft-metadata

What does the get-nft-metadata tool do? +

Get NFT collection and token metadata. 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 get-nft-metadata? +

Register the Xrpl MCP server in PolicyLayer and add a rule for get-nft-metadata: 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 get-nft-metadata? +

get-nft-metadata is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get-nft-metadata? +

Yes. Add a rate_limit block to the get-nft-metadata 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 get-nft-metadata completely? +

Set action: deny in the PolicyLayer policy for get-nft-metadata. 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 get-nft-metadata? +

get-nft-metadata 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 →