place_limit_order_tool
AI agents use place_limit_order_tool to commit financial operations through Alpaca MCP Gold Standard — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Despite the empty description, the tool name clearly indicates placing a limit order on a financial exchange via Alpaca, which constitutes a financial commitment. Misuse could result in unintended trades, financial losses, or market exposure. Severity is critical due to direct financial impact.
From the tool's definition Tool name 'place_limit_order_tool' — 'place' and 'order' indicate financial order execution; server description explicitly mentions 'order execution' among its capabilities for professional trading with Alpaca.
Attacks that exploit this kind of access
place_limit_order_tool. It is categorised as a Financial tool in the Alpaca MCP Gold Standard MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Alpaca MCP Gold Standard MCP server in PolicyLayer and add a rule for place_limit_order_tool: 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 Alpaca MCP Gold Standard. Nothing to install.
place_limit_order_tool is a Financial tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the place_limit_order_tool 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.
Set action: deny in the PolicyLayer policy for place_limit_order_tool. 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.
place_limit_order_tool is provided by the Alpaca MCP Gold Standard MCP server (joravetz/alpaca-mcp-gold). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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