cancel_option_order_by_id

THE RISK

Critical Risk

Why cancel_option_order_by_id needs a policy

Cancelling an order is an irreversible action — once a live (paper) option order is cancelled, it cannot be reinstated. The cancel operation permanently removes the pending order from the system. Given this is a trading context with real market data, misuse could disrupt intended trading strategies irreversibly, warranting high severity.

From the tool's definition Cancel a specific option order by its ID

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

POLICY

How to control cancel_option_order_by_id

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

policy.json

{
  "version": "1",
  "default": "deny",
  "hide": [
    "cancel_option_order_by_id"
  ]
}

cancel_option_order_by_id disappears from the agent's tool list entirely, and any attempt to call it is denied. The rest of the server keeps working.

Create a free account and register Open Paper Trading MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

RESTRICT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Open Paper Trading MCP tools

Financial buy_option_limit Place a limit buy order for an option Financial buy_stock buy_stock Financial buy_stock_limit Place a limit buy order for stocks Financial option_credit_spread option_credit_spread Financial option_debit_spread option_debit_spread Financial sell_option_limit Place a limit sell order for an option Financial sell_stock sell_stock Financial sell_stock_limit Place a limit sell order for stocks

All 44 Open Paper Trading MCP tools →

Destructive tools on other servers

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Go deeper

Critical-risk tools in Open Paper Trading MCP → Every critical-risk tool this server exposes, in one view.
All critical-risk MCP tools → Every critical-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Blast radius → How much damage one compromised or confused agent can do — and how to bound it.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about cancel_option_order_by_id

What does the cancel_option_order_by_id tool do? +

Cancel a specific option order by its ID. It is categorised as a Destructive tool in the Open Paper Trading MCP MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.

How do I enforce a policy on cancel_option_order_by_id? +

Register the Open Paper Trading MCP server in PolicyLayer and add a rule for cancel_option_order_by_id: 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 Open Paper Trading MCP. Nothing to install.

What risk level is cancel_option_order_by_id? +

cancel_option_order_by_id is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.

Can I rate-limit cancel_option_order_by_id? +

Yes. Add a rate_limit block to the cancel_option_order_by_id 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_option_order_by_id completely? +

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

cancel_option_order_by_id is provided by the Open Paper Trading MCP server (open-agent-tools/open-paper-trading-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Open Paper Trading MCP tool call.

Start from Open Paper Trading MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →