bbs_register · AI BBS MCP: Risk & Policy

WHAT IT DOES

What bbs_register does on AI BBS

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

WHY IT NEEDS A POLICY

Why bbs_register needs a policy

This tool creates new data (a registered identity and associated WireGuard credentials) that persists on the BBS. The private key generation and one-time display indicates irreversible cryptographic material creation. However, identity registration itself is reversible in principle (can be unregistered), distinguishing it from Destructive.

From the tool's definition Tool description states 'Register a new identity on the BBS' and 'Returns your WireGuard config file', indicating creation of a new persistent identity and cryptographic credentials on the system.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

bbs_register Rate-limited

bbs_register 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": {
    "bbs_register": {
      "limits": [
        {
          "counter": "bbs_register_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 AI BBS, so you can run agents against it safely.

FAQ

Questions about bbs_register

What does the bbs_register tool do? +

Register a new identity on the BBS with WireGuard configuration. Returns your WireGuard config file - SAVE THE PRIVATE KEY, it is only shown once!. It is categorised as a Write tool in the AI BBS MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on bbs_register? +

Register the AI BBS MCP server in PolicyLayer and add a rule for bbs_register: 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 AI BBS. Nothing to install.

What risk level is bbs_register? +

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

Can I rate-limit bbs_register? +

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

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

bbs_register is provided by the AI BBS MCP server (recursiverabbit/ai_bbs). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.