propose_outcome · Basis MCP Server MCP: Risk & Policy

WHAT IT DOES

What propose_outcome does on Basis MCP Server

AI agents use propose_outcome 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 propose_outcome needs a policy

This tool commits a financial obligation by posting a 5 USDB bond to propose an outcome in what appears to be a prediction market. It involves real financial assets (USDB tokens as collateral/bond), making it a Financial category action. Misuse could result in loss of the bonded funds or manipulation of prediction market outcomes.

From the tool's definition Propose winning outcome (5 USDB bond)

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

propose_outcome Approval-gated

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

FAQ

Questions about propose_outcome

What does the propose_outcome tool do? +

Propose winning outcome (5 USDB bond). 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 propose_outcome? +

Register the Basis MCP Server MCP server in PolicyLayer and add a rule for propose_outcome: 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 propose_outcome? +

propose_outcome 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 propose_outcome? +

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

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

propose_outcome 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.