Get option chains for a ticker
AI agents call get_stock_option_chains to retrieve information from Unusual Whales MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves option chain data (strike prices, expiration dates, bid/ask spreads, volume, open interest, etc.) for a given stock ticker. It performs no side effects, creates no data, executes no code, deletes nothing, and moves no money. It is purely informational data access, falling squarely into the Read category with low severity.
From the tool's definition Tool name 'get_stock_option_chains' and description 'Get option chains for a ticker' indicate a data retrieval operation. The verb 'get' and lack of any modification, deletion, execution, or financial transaction language confirm this is a query-only tool.
Attacks that exploit this kind of access
Get option chains for a ticker. It is categorised as a Read tool in the Unusual Whales MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Unusual Whales MCP Server MCP server in PolicyLayer and add a rule for get_stock_option_chains: 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 Unusual Whales MCP Server. Nothing to install.
get_stock_option_chains 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_stock_option_chains 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_stock_option_chains. 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_stock_option_chains is provided by the Unusual Whales MCP Server MCP server (phields/unusualwhales-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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