schwab_find_tradable_options

THE RISK

Low Risk

Why schwab_find_tradable_options needs a policy

This tool queries available option contracts from Schwab based on specified filter criteria. It retrieves information about tradable instruments without creating orders, executing trades, or modifying any account state. While the server provides trading capabilities, this specific tool is limited to discovering and listing available options data, making it a Read category tool with low severity.

From the tool's definition Tool name 'schwab_find_tradable_options' and description 'Find tradable option contracts filtered by expiration, type, and strike' indicate a query/search operation that retrieves option contract data.

Documented attack patterns abuse exactly the kind of access schwab_find_tradable_options gives an agent:

POLICY

How to control schwab_find_tradable_options

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 schwab_find_tradable_options:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "schwab_find_tradable_options": {}
  }
}

schwab_find_tradable_options is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Open Stocks MCP — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

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EXPLORE

Related tools and policies

More Open Stocks MCP tools

Financial schwab_order_sell_stop Place a stop sell order for stock. Financial sell_stock_stop_loss Places a stop loss sell order for a stock. Financial buy_option_limit Places a limit buy order for an option. Financial buy_stock_limit Places a limit buy order for a stock. Financial buy_stock_market Places a market buy order for a stock. Financial option_credit_spread option_credit_spread Financial option_debit_spread option_debit_spread Financial schwab_buy_stock_limit Place a limit buy order for stock.

All 152 Open Stocks MCP tools →

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about schwab_find_tradable_options

What does the schwab_find_tradable_options tool do? +

Find tradable option contracts filtered by expiration, type, and strike. It is categorised as a Read tool in the Open Stocks MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on schwab_find_tradable_options? +

Register the Open Stocks MCP server in PolicyLayer and add a rule for schwab_find_tradable_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.

What risk level is schwab_find_tradable_options? +

schwab_find_tradable_options is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit schwab_find_tradable_options? +

Yes. Add a rate_limit block to the schwab_find_tradable_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.

How do I block schwab_find_tradable_options completely? +

Set action: deny in the PolicyLayer policy for schwab_find_tradable_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.

What MCP server provides schwab_find_tradable_options? +

schwab_find_tradable_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.

Enforce policy on every Open Stocks MCP tool call.

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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