schwab_option_chain_by_expiration
A read tool on the Open Stocks MCP server.
This record as markdown: /tools/open-agent-tools-open-stocks-mcp/schwab-option-chain-by-expiration.md
What schwab_option_chain_by_expiration does on Open Stocks MCP
AI agents call schwab_option_chain_by_expiration to retrieve information from Open Stocks MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why schwab_option_chain_by_expiration is rated Low
This tool retrieves option chain information from Schwab, which is a read-only query operation with no side effects. It does not create positions, execute trades, modify account settings, or delete data. While the data is financial in nature, the tool itself performs only data retrieval without moving money or creating financial obligations.
From the tool's definition Tool name 'schwab_option_chain_by_expiration' indicates retrieval of option chain data filtered by expiration date.
Attacks that exploit this kind of access
The rule that runs schwab_option_chain_by_expiration safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Open Stocks MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For schwab_option_chain_by_expiration, this is the rule to start with:
schwab_option_chain_by_expiration is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Open Stocks MCP, apply this rule, and every schwab_option_chain_by_expiration call is checked against it from then on.
Questions about schwab_option_chain_by_expiration
schwab_option_chain_by_expiration is a read tool on the Open Stocks MCP server. 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 schwab_option_chain_by_expiration: 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.
schwab_option_chain_by_expiration 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 schwab_option_chain_by_expiration 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 schwab_option_chain_by_expiration. 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.
schwab_option_chain_by_expiration 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.
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