pm_merge_positions

THE RISK

Critical Risk

Why pm_merge_positions needs a policy

This tool interacts with a Conditional Token Framework (CTF) contract to merge prediction market positions back into USDC collateral. This involves on-chain financial transactions that convert outcome tokens into real monetary value (USDC), constituting a financial operation. Misuse could result in loss of funds or unintended liquidation of market positions.

From the tool's definition Merge outcome token sets back to USDC collateral on CTF contract

Documented attack patterns abuse exactly the kind of access pm_merge_positions gives an agent:

POLICY

How to control pm_merge_positions

PolicyLayer is an MCP gateway — it sits between your AI agents and Waiaas, and nothing reaches the server without passing your rules. This is the rule we recommend for pm_merge_positions:

policy.json

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

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

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FAQ

Questions about pm_merge_positions

What does the pm_merge_positions tool do? +

Merge outcome token sets back to USDC collateral on CTF contract. It is categorised as a Financial tool in the Waiaas MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on pm_merge_positions? +

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

What risk level is pm_merge_positions? +

pm_merge_positions 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_merge_positions? +

Yes. Add a rate_limit block to the pm_merge_positions 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_merge_positions completely? +

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

pm_merge_positions is provided by the Waiaas MCP server (minhoyoo-iotrust/waiaas). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Waiaas tool call.

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