Cancel an existing order. Requires API key authentication.
AI agents use polymarket_cancel_order to commit financial operations through Polymarket MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Cancelling an order on a prediction market directly affects financial commitments and trading positions. While it could be seen as undoing a financial action, in trading contexts order cancellation is itself a consequential financial operation that affects market participation and open positions. It falls under Financial as it manages financial orders on a prediction market platform.
From the tool's definition Cancel an existing order. Requires API key authentication.
Attacks that exploit this kind of access
Cancel an existing order. Requires API key authentication. It is categorised as a Financial tool in the Polymarket MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Polymarket MCP Server MCP server in PolicyLayer and add a rule for polymarket_cancel_order: 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 Polymarket MCP Server. Nothing to install.
polymarket_cancel_order is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the polymarket_cancel_order 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.
Set action: deny in the PolicyLayer policy for polymarket_cancel_order. 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.
polymarket_cancel_order is provided by the Polymarket MCP Server MCP server (Curious-Layer/cl-mcp-polymarket). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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