cancel_order · Mcp Pear MCP: Risk & Policy

WHAT IT DOES

What cancel_order does on Mcp Pear

AI agents use cancel_order to create or update resources in Mcp Pear — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Mcp Pear environment.

WHY IT NEEDS A POLICY

Why cancel_order needs a policy

Cancelling an order is a reversible write action (the order can be re-placed), but it carries high severity because mistakenly cancelling live stop-loss or take-profit orders can expose positions to significant financial risk. It does not directly move money or irreversibly destroy data, so Write is the most appropriate category over Financial or Destructive.

From the tool's definition Cancel a pending Pear Protocol limit, take-profit, or stop-loss order by orderId. WRITE: cancels a live order.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

cancel_order Rate-limited

cancel_order stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "cancel_order": {
      "limits": [
        {
          "counter": "cancel_order_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Mcp Pear, so you can run agents against it safely.

FAQ

Questions about cancel_order

What does the cancel_order tool do? +

Cancel a pending Pear Protocol limit, take-profit, or stop-loss order by orderId. Does not affect already-filled portions. For TWAP orders, use cancel_twap_order. WRITE: cancels a live order. Requires PEAR_TRADE_ENABLED=true. It is categorised as a Write tool in the Mcp Pear MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on cancel_order? +

Register the Mcp Pear MCP server in PolicyLayer and add a rule for 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 Mcp Pear. Nothing to install.

What risk level is cancel_order? +

cancel_order is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit cancel_order? +

Yes. Add a rate_limit block to the 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.

How do I block cancel_order completely? +

Set action: deny in the PolicyLayer policy for 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.

What MCP server provides cancel_order? +

cancel_order is provided by the Mcp Pear MCP server (marvelnwachukwu/mcp-pear). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.