AI agents call get_node_network to retrieve information from Rpg without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves/queries an existing node network structure from the RPG game engine's persistence layer (SQLite) without modifying, creating, or destroying data. It has no side effects and no ability to alter game state. The blast radius of misuse is minimal—an agent could only access data it's already authorized to query. Classification as Read is appropriate.
From the tool's definition Tool name 'get_node_network' combined with description 'Get a node network by ID' indicates a retrieval operation. The verb 'Get' and the lack of any modification, deletion, or execution language confirm this is a read-only query.
Documented attack patterns abuse exactly the kind of access get_node_network gives an agent:
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 get_node_network:
{
"version": "1",
"default": "deny",
"tools": {
"get_node_network": {}
}
}get_node_network is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get a node network by ID. It is categorised as a Read tool in the Rpg MCP Server, which means it retrieves data without modifying state.
Register the Rpg MCP server in PolicyLayer and add a rule for get_node_network: 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.
get_node_network is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the get_node_network 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.
Set action: deny in the PolicyLayer policy for get_node_network. 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.
get_node_network 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.
Start from Rpg, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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47 Rpg tools catalogued and risk-classified — across an index of 43,000+ MCP servers.