close_position

Close a position by ticket number.

SERVERMCP Trader Server SOURCEaf7007/mcp-trader

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/af7007-mcp-trader/close-position.md

WHAT IT DOES

What close_position does on MCP Trader Server

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

RISK

Why close_position is rated Critical

Closing a trading position directly moves money by executing a sell/buy transaction at market price, which is a financial action. It cannot be undone once executed in the market. This falls under Financial (most severe category) with critical severity because an AI agent misusing this tool could close positions at inopportune times, causing significant financial losses.

From the tool's definition 'Close a position by ticket number' — closing a trading position is a financial operation that executes a market transaction, locking in profits or losses and committing financial obligations irreversibly.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs close_position safely

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

close_position Approval-gated

Any call to close_position 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": {
    "close_position": {
      "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 MCP Trader Server, apply this rule, and every close_position call is checked against it from then on.

FAQ

Questions about close_position

What does the close_position tool do? +

Close a position by ticket number. It is categorised as a Financial tool in the MCP Trader Server MCP Server, which means it involves financial transactions. Block by default and require explicit approval.

How do I enforce a policy on close_position? +

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

What risk level is close_position? +

close_position 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 close_position? +

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

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

close_position is provided by the MCP Trader Server MCP server (af7007/mcp-trader). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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