AI agents call find_options to retrieve information from Open Stocks MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool searches and filters options data to present available tradable contracts. It has no side effects—it does not execute trades, modify positions, delete data, or commit financial obligations. While the server context involves trading capabilities, this specific tool is purely a search/query function that returns filtered market data for user review before any trading decision occurs.
From the tool's definition Tool name 'find_options' and description 'Finds tradable options with optional filtering' indicate a query/search operation that retrieves data about available options contracts.
Documented attack patterns abuse exactly the kind of access find_options gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Open Stocks MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for find_options:
{
"version": "1",
"default": "deny",
"tools": {
"find_options": {}
}
}find_options is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Finds tradable options with optional filtering. It is categorised as a Read tool in the Open Stocks MCP MCP Server, which means it retrieves data without modifying state.
Register the Open Stocks MCP server in PolicyLayer and add a rule for find_options: 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 Stocks MCP. Nothing to install.
find_options is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the find_options 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 find_options. 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.
find_options is provided by the Open Stocks MCP server (open-agent-tools/open-stocks-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Open Stocks 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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152 Open Stocks MCP tools catalogued and risk-classified — across an index of 43,000+ MCP servers.