AI agents call get_option_chain to retrieve information from Schwab without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Despite empty description, the name 'get_option_chain' strongly indicates querying market data with no side effects. Sibling 'get_*' tools on this financial brokerage server are all read operations (except cancel_order and the Execute-category order placement tools). Retrieving options data causes no trades, account changes, or financial commitments.
From the tool's definition Tool name 'get_option_chain' and context of sibling tools (get_instrument, get_option_expirations, get_price_history, get_movers, get_market_hours) all pattern-match to read-only data retrieval operations.
Attacks that exploit this kind of access
get_option_chain. It is categorised as a Read tool in the Schwab MCP Server, which means it retrieves data without modifying state.
Register the Schwab MCP server in PolicyLayer and add a rule for get_option_chain: 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 Schwab. Nothing to install.
get_option_chain 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 get_option_chain 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 get_option_chain. 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.
get_option_chain is provided by the Schwab MCP server (k1xme/schwab-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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