list_node_networks

THE RISK

Low Risk

Why list_node_networks needs a policy

This tool retrieves or queries existing node network data from the RPG game state, filtered by optional parameters. It performs no creation, modification, deletion, or execution of external operations. The blast radius of misuse is minimal—an agent retrieving node network information cannot cause harm to game state or external systems. Classified as Read with low severity.

From the tool's definition Tool name 'list_node_networks' combined with description 'List node networks, optionally filtered by world' indicates a query/retrieval operation with no modification or side effects.

Documented attack patterns abuse exactly the kind of access list_node_networks gives an agent:

POLICY

How to control list_node_networks

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_node_networks": {}
  }
}

list_node_networks 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 Rpg — 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 list_node_networks

What does the list_node_networks tool do? +

List node networks, optionally filtered by world. It is categorised as a Read tool in the Rpg MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_node_networks? +

Register the Rpg MCP server in PolicyLayer and add a rule for list_node_networks: 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 Rpg. Nothing to install.

What risk level is list_node_networks? +

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

Can I rate-limit list_node_networks? +

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

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

list_node_networks is provided by the Rpg MCP server (mnehmos/mnehmos.rpg.mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Rpg tool call.

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

CHECK YOUR STACK →