create_campaign · RPG Ledger MCP Server MCP: Risk & Policy

WHAT IT DOES

What create_campaign does on RPG Ledger MCP Server

AI agents use create_campaign to create or update resources in RPG Ledger MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your RPG Ledger MCP Server environment.

WHY IT NEEDS A POLICY

Why create_campaign needs a policy

This tool creates new campaign data structures (reversible write operation). While the description is empty, the name 'create_campaign' combined with the server's stated purpose of managing campaign state through MCP tools clearly indicates it modifies game state by adding new campaigns.

From the tool's definition Tool name is 'create_campaign' which creates new RPG campaign state. Server description states it 'manages campaign state' and 'supports campaign mutations.' Creating a campaign is a reversible write operation that adds new data to the game session.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

create_campaign Rate-limited

create_campaign stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "create_campaign": {
      "limits": [
        {
          "counter": "create_campaign_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches RPG Ledger MCP Server, so you can run agents against it safely.

FAQ

Questions about create_campaign

What does the create_campaign tool do? +

create_campaign. It is categorised as a Write tool in the RPG Ledger MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on create_campaign? +

Register the RPG Ledger MCP Server MCP server in PolicyLayer and add a rule for create_campaign: 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 Ledger MCP Server. Nothing to install.

What risk level is create_campaign? +

create_campaign is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit create_campaign? +

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

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

create_campaign is provided by the RPG Ledger MCP Server MCP server (sepa79/rpg-ledger-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.