place-fleet · Defcon MCP: Risk & Policy

WHAT IT DOES

What place-fleet does on Defcon

AI agents use place-fleet to create or update resources in Defcon — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Defcon environment.

WHY IT NEEDS A POLICY

Why place-fleet needs a policy

This tool creates/places game entities (fleet of ships) at specified coordinates within the DEFCON game. It is a Write operation as it modifies the game state by adding a fleet, but it is reversible in the sense that fleets can be moved or destroyed later. While it operates within a game simulation, misuse could lead to unintended in-game consequences, hence medium severity.

From the tool's definition Places a fleet of ships at the specified coordinates. You can specify up to 6 ships.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

place-fleet Rate-limited

place-fleet 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": {
    "place-fleet": {
      "limits": [
        {
          "counter": "place-fleet_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 Defcon, so you can run agents against it safely.

FAQ

Questions about place-fleet

What does the place-fleet tool do? +

Places a fleet of ships at the specified coordinates. You can specify up to 6 ships. IMPORTANT: Check the response to verify if placement was successful!. It is categorised as a Write tool in the Defcon MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on place-fleet? +

Register the Defcon MCP server in PolicyLayer and add a rule for place-fleet: 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 Defcon. Nothing to install.

What risk level is place-fleet? +

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

Can I rate-limit place-fleet? +

Yes. Add a rate_limit block to the place-fleet 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 place-fleet completely? +

Set action: deny in the PolicyLayer policy for place-fleet. 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 place-fleet? +

place-fleet is provided by the Defcon MCP server (jorisvddonk/defcon-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.