AI agents use option_credit_spread to commit financial operations through Open Paper Trading MCP — usually the final step of a payment, billing, or trading workflow. A call moves real money.
Despite the empty description, the tool name 'option_credit_spread' clearly refers to an options trading strategy (selling a higher-premium option and buying a lower-premium option to receive a net credit). In the context of this server — which facilitates paper trading of stocks, options, ETFs, and bonds — this tool almost certainly places or manages an options credit spread order.
From the tool's definition Tool name 'option_credit_spread' on a paper trading server with sibling tools like buy_option_limit, buy_stock, cancel_option_order_by_id — all of which are financial trading operations.
Documented attack patterns abuse exactly the kind of access option_credit_spread gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Open Paper Trading MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for option_credit_spread:
{
"version": "1",
"default": "deny",
"tools": {
"option_credit_spread": {
"deny_if": [
{
"conditions": [],
"on_deny": "Requires human approval."
}
]
}
}
}Any call to option_credit_spread is blocked until a human approves it. The rest of the server keeps working.
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option_credit_spread. It is categorised as a Financial tool in the Open Paper Trading MCP MCP Server, which means it involves financial transactions. Block by default and require explicit approval.
Register the Open Paper Trading MCP server in PolicyLayer and add a rule for option_credit_spread: 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 Open Paper Trading MCP. Nothing to install.
option_credit_spread 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 option_credit_spread 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 option_credit_spread. 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.
option_credit_spread is provided by the Open Paper Trading MCP server (open-agent-tools/open-paper-trading-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Open Paper Trading MCP, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
44 Open Paper Trading MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.