mt5_order_send · MT5 MCP Server MCP: Risk & Policy

WHAT IT DOES

What mt5_order_send does on MT5 MCP Server

AI agents use mt5_order_send to commit financial operations through MT5 MCP Server — usually the final step of a payment, billing, or trading workflow. A call moves real money.

WHY IT NEEDS A POLICY

Why mt5_order_send needs a policy

This tool sends trading orders (market, limit, and stop orders) directly to MetaTrader 5, committing real financial transactions. Misuse by an AI agent could result in unintended trades, significant financial losses, or unwanted market exposure. Financial category is the most severe applicable.

From the tool's definition Tool name 'mt5_order_send' and description '新規注文（成行/指値/逆指値）' (New order: market/limit/stop) on a MetaTrader 5 trading server.

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

mt5_order_send Approval-gated

Any call to mt5_order_send 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": {
    "mt5_order_send": {
      "deny_if": [
        {
          "conditions": [],
          "on_deny": "Requires human approval."
        }
      ]
    }
  }
}

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PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches MT5 MCP Server, so you can run agents against it safely.

FAQ

Questions about mt5_order_send

What does the mt5_order_send tool do? +

新規注文（成行/指値/逆指値）。. It is categorised as a Financial tool in the MT5 MCP Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on mt5_order_send? +

Register the MT5 MCP Server MCP server in PolicyLayer and add a rule for mt5_order_send: 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 MT5 MCP Server. Nothing to install.

What risk level is mt5_order_send? +

mt5_order_send 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 mt5_order_send? +

Yes. Add a rate_limit block to the mt5_order_send 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 mt5_order_send completely? +

Set action: deny in the PolicyLayer policy for mt5_order_send. 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 mt5_order_send? +

mt5_order_send is provided by the MT5 MCP Server MCP server (junmt/mt5-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.