set-silo-defensive · Defcon MCP: Risk & Policy

WHAT IT DOES

What set-silo-defensive does on Defcon

AI agents use set-silo-defensive 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 set-silo-defensive needs a policy

This tool modifies the state of a game object (a silo) by toggling its operational mode to defensive. It is a reversible configuration change within a video game simulation — not a destructive, financial, or real-world execute action. The blast radius of misuse is minimal since it only affects a game state, making severity low.

From the tool's definition Sets a silo to defensive mode to shoot down incoming nuclear missiles

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

set-silo-defensive Rate-limited

set-silo-defensive 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": {
    "set-silo-defensive": {
      "limits": [
        {
          "counter": "set-silo-defensive_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 set-silo-defensive

What does the set-silo-defensive tool do? +

Sets a silo to defensive mode to shoot down incoming nuclear missiles. IMPORTANT: Check the response to verify if the command 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 set-silo-defensive? +

Register the Defcon MCP server in PolicyLayer and add a rule for set-silo-defensive: 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 set-silo-defensive? +

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

Can I rate-limit set-silo-defensive? +

Yes. Add a rate_limit block to the set-silo-defensive 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 set-silo-defensive completely? +

Set action: deny in the PolicyLayer policy for set-silo-defensive. 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 set-silo-defensive? +

set-silo-defensive 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.