cancel_order

Cancel an open order on the DEX. The remaining unfilled amount will be

SERVERTempo SOURCEarome3/tempo-mcp

Critical RISK CLASS

Category Financial

Parameters 00 required

Recommended Approval-gatedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/arome3-tempo-mcp/cancel-order.md

WHAT IT DOES

What cancel_order does on Tempo

AI agents use cancel_order to commit financial operations through Tempo, usually the final step of a payment, billing, or trading workflow. A call moves real money.

RISK

Why cancel_order is rated Critical

Cancelling an open order on a DEX is a financial operation that alters an active trading position. While cancellation itself may be considered reversible in some sense (you could re-place the order), it directly affects financial instruments and trades on a blockchain, placing it firmly in the Financial category.

From the tool's definition 'Cancel an open order on the DEX' — directly modifies financial state by cancelling a DEX (decentralized exchange) trading order, affecting financial obligations and positions.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs cancel_order safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Tempo, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For cancel_order, this is the rule to start with:

cancel_order Approval-gated

Any call to cancel_order is blocked until a human approves it. The rest of the server keeps working.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "cancel_order": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

GATE THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Tempo, apply this rule, and every cancel_order call is checked against it from then on.

FAQ

Questions about cancel_order

What does the cancel_order tool do? +

Cancel an open order on the DEX. The remaining unfilled amount will be. It is categorised as a Financial tool in the Tempo MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on cancel_order? +

Register the Tempo 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 Tempo. Nothing to install.

What risk level is cancel_order? +

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

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 Tempo MCP server (arome3/tempo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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