amend_order

THE RISK

Critical Risk

Why amend_order needs a policy

Amending an order on a financial trading platform directly modifies a live trading order, which constitutes a financial operation. Misuse could alter price, quantity, or direction of trades, resulting in unintended financial exposure or losses. The 'atomic amend in-place' language confirms this modifies real exchange orders.

From the tool's definition amend_order on a trading platform (Kraken Pro) that atomically amends in-place an existing order — modifying live financial orders on an exchange

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

POLICY

How to control amend_order

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

policy.json

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

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

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

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EXPLORE

Related tools and policies

More Kraken Pro MCP tools

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All 17 Kraken Pro MCP tools →

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Go deeper

Critical-risk tools in Kraken Pro 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.
Human-in-the-loop → When a tool call should wait for a person — and when policy can decide alone.
Tool call approval → Approval gates on individual tool calls: auto-allow, prompt, or deny.
How to Add Spending Controls to Any MCP Agent →
Rate Limiting MCP Tool Calls: A Practical Guide →

FAQ

Questions about amend_order

What does the amend_order tool do? +

Atomic amend in-place (keeps identifiers & queue priority where possible). It is categorised as a Financial tool in the Kraken Pro MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on amend_order? +

Register the Kraken Pro MCP server in PolicyLayer and add a rule for amend_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 Kraken Pro MCP. Nothing to install.

What risk level is amend_order? +

amend_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 amend_order? +

Yes. Add a rate_limit block to the amend_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 amend_order completely? +

Set action: deny in the PolicyLayer policy for amend_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 amend_order? +

amend_order is provided by the Kraken Pro MCP server (oilst/kraken-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Kraken Pro MCP tool call.

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

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