cancelOrder

THE RISK

Critical Risk

Why cancelOrder needs a policy

Cancelling an order is an irreversible action in the context of trading — once cancelled, the order no longer exists and cannot be reinstated. This is destructive in nature as it permanently removes an active order from the exchange. Given this is on a cryptocurrency trading platform, misuse could result in significant financial impact by cancelling legitimate open orders.

From the tool's definition cancelOrder - 'Cancel a single open order'

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

POLICY

How to control cancelOrder

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

policy.json

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

cancelOrder 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 Bybit MCP Server — 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 Bybit MCP Server tools

Financial removeLiquidity Withdraw funds from a Liquidity Mining pool position.\n\n- Financial confirmQuote Confirm the quote and execute the conversion trade.\n\nImportant:\n- Must confirm within t Financial executePurchase Place a buy order to purchase on-chain tokens with payment tokens.\nReturns an Financial executeQuote Execute (accept) a quote to initiate the multi-leg trade.\nThis endpoint is asynchronous - Financial executeRedeem Place a sell order to redeem on-chain tokens for payment tokens.\nReturns an Financial quickRepayment Execute quick repayment for specified coin Financial accountBorrow Manual borrow for Unified account.\n\nRules:\n- Borrowing via OpenAPI endpoint supports va Financial accountRepay Manually repay the liabilities of Unified account.\n\nRules:\n- If neither

All 326 Bybit MCP Server tools →

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Go deeper

Critical-risk tools in Bybit MCP Server → 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 cancelOrder

What does the cancelOrder tool do? +

Cancel a single open order by. It is categorised as a Destructive tool in the Bybit MCP Server 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 cancelOrder? +

Register the Bybit MCP Server MCP server in PolicyLayer and add a rule for cancelOrder: 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 Bybit MCP Server. Nothing to install.

What risk level is cancelOrder? +

cancelOrder 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 cancelOrder? +

Yes. Add a rate_limit block to the cancelOrder 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 cancelOrder completely? +

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

cancelOrder is provided by the Bybit MCP Server MCP server (bybit-exchange/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 Bybit MCP Server tool call.

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

CHECK YOUR STACK →