buy_egg · Baselings MCP: Risk & Policy

WHAT IT DOES

What buy_egg does on Baselings

AI agents use buy_egg 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_egg needs a policy

This tool spends real USDC cryptocurrency to purchase in-game items. It directly commits financial resources from the agent's wallet, making it a Financial category tool. Misuse could result in unintended spending of cryptocurrency funds, with severity rated high due to potential for repeated purchases draining funds.

From the tool's definition Buy a new egg (costs USDC). Type: random ($0.10), giant ($6)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

buy_egg Approval-gated

Any call to buy_egg 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_egg": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

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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_egg

What does the buy_egg tool do? +

Buy a new egg (costs USDC). Type: random ($0.10), giant ($6). 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_egg? +

Register the Baselings MCP server in PolicyLayer and add a rule for buy_egg: 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_egg? +

buy_egg 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_egg? +

Yes. Add a rate_limit block to the buy_egg 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_egg completely? +

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

buy_egg 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.