pm_buy · Basis MCP Server MCP: Risk & Policy

WHAT IT DOES

What pm_buy does on Basis MCP Server

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

WHY IT NEEDS A POLICY

Why pm_buy needs a policy

This tool executes a financial transaction by purchasing shares in a market outcome on a blockchain protocol. It involves spending tokens/currency to acquire shares, making it a financial operation. Misuse could result in significant financial loss through unwanted purchases, incorrect amounts, or manipulation.

From the tool's definition 'Buy shares in a private market outcome' — directly commits financial resources to purchase shares in a prediction/private market

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

pm_buy Approval-gated

Any call to pm_buy 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": {
    "pm_buy": {
      "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 Basis MCP Server, so you can run agents against it safely.

FAQ

Questions about pm_buy

What does the pm_buy tool do? +

Buy shares in a private market outcome. It is categorised as a Financial tool in the Basis MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on pm_buy? +

Register the Basis MCP Server MCP server in PolicyLayer and add a rule for pm_buy: 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 Basis MCP Server. Nothing to install.

What risk level is pm_buy? +

pm_buy 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 pm_buy? +

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

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

pm_buy is provided by the Basis MCP Server MCP server (launch-on-basis/mcp-ts). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.