Low Risk

load_tool_schema

Load the full input schema for a specific tool (required before first use). Returns parameter definitions, types, and usage info.

How to control load_tool_schema ↓

What load_tool_schema does on Rpg

AI agents call load_tool_schema 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.

Low Risk

Why load_tool_schema needs a policy

This tool retrieves and returns schema information about other tools—it reads and queries metadata without creating, modifying, executing, or deleting anything. It has no side effects on game state, player data, or persistence layer. The blast radius if misused by an AI agent is negligible since schema introspection alone cannot cause harm.

From the tool's definition Tool name 'load_tool_schema' and description 'Load the full input schema for a specific tool' indicates retrieval of metadata/documentation. Returns 'parameter definitions, types, and usage info' with no side effects mentioned.

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

How to control load_tool_schema

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 load_tool_schema:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "load_tool_schema": {}
  }
}

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

  1. Create a free account and register Rpg — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Related tools and policies

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Questions about load_tool_schema

What does the load_tool_schema tool do? +

Load the full input schema for a specific tool (required before first use). Returns parameter definitions, types, and usage info. 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 load_tool_schema? +

Register the Rpg MCP server in PolicyLayer and add a rule for load_tool_schema: 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 load_tool_schema? +

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

Can I rate-limit load_tool_schema? +

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

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

load_tool_schema 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.

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47 Rpg tools catalogued and risk-classified — across an index of 43,000+ MCP servers.

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