orders.cancel
Cancel ALL open/pending limit orders on Polymarket for this account in a single call. Use as an emergency stop, before changing strategy, after a sudden price move, or when unwinding positions. Not reversible — cancelled orders must be re-placed via orders.buy, wta.bid, or orders.batch. Returns t...
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What orders.cancel does on Polymarket Agent Mcp
AI agents call orders.cancel to permanently remove resources in Polymarket Agent Mcp, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
Why orders.cancel is rated Critical
Irreversibly cancels all open orders; cannot be undone without manual replacement, with severe financial consequences.
From the tool's definition Cancel ALL open/pending limit orders. Not reversible — cancelled orders must be re-placed.
Attacks that exploit this kind of access
The rule that runs orders.cancel safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Polymarket Agent Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For orders.cancel, this is the rule to start with:
orders.cancel is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Polymarket Agent Mcp, apply this rule, and every orders.cancel call is checked against it from then on.
Questions about orders.cancel
Cancel ALL open/pending limit orders on Polymarket for this account in a single call. Use as an emergency stop, before changing strategy, after a sudden price move, or when unwinding positions. Not reversible — cancelled orders must be re-placed via orders.buy, wta.bid, or orders.batch. Returns the count of cancelled orders. Call orders.list first if you want to preview what will be cancelled. Only works in live mode (no-op in preview). No parameters. It is categorised as a Destructive tool in the Polymarket Agent Mcp MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Polymarket Agent MCP server in PolicyLayer and add a rule for orders.cancel: 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 Agent Mcp. Nothing to install.
orders.cancel is a Destructive 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 orders.cancel 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 orders.cancel. 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.
orders.cancel is provided by the Polymarket Agent MCP server (demwick/polymarket-agent-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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