buy_house · Baselings MCP: Risk & Policy

WHAT IT DOES

What buy_house does on Baselings

AI agents use buy_house to commit financial operations through Baselings — usually the final step of a payment, billing, or trading workflow. A call moves real money.

WHY IT NEEDS A POLICY

Why buy_house needs a policy

Purchasing an NFT on-chain commits real financial value (ETH/USDC/BTC as described in the server context). This is an irreversible on-chain financial transaction that transfers funds in exchange for a blockchain asset, making it a Financial category action with high severity due to the potential for significant monetary loss if misused by an AI agent.

From the tool's definition Buy a house NFT (gives rooms for baselings). Types: 0-3

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

buy_house Approval-gated

Any call to buy_house is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "buy_house": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE THIS TOOL →

Instant setup, no code required.

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

FAQ

Questions about buy_house

What does the buy_house tool do? +

Buy a house NFT (gives rooms for baselings). Types: 0-3. It is categorised as a Financial tool in the Baselings MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on buy_house? +

Register the Baselings MCP server in PolicyLayer and add a rule for buy_house: 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 Baselings. Nothing to install.

What risk level is buy_house? +

buy_house is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit buy_house? +

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

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

buy_house is provided by the Baselings MCP server (jimbo530/baselings-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.