Fetches historical options chain data. Premium endpoint.
AI agents call optionsData_historicalOptions to retrieve information from MCP Avantage without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical financial data (options chains) from the Alpha Vantage API. It performs a read-only query operation with no side effects—it does not execute trades, modify positions, delete data, or trigger financial transactions. While it provides data relevant to financial markets, the tool itself merely fetches and returns information.
From the tool's definition Tool name 'historicalOptions' and description 'Fetches historical options chain data' indicate retrieval of past options pricing and chain information without modification or execution of trades.
Attacks that exploit this kind of access
Fetches historical options chain data. Premium endpoint. It is categorised as a Read tool in the MCP Avantage MCP Server, which means it retrieves data without modifying state.
Register the MCP Avantage MCP server in PolicyLayer and add a rule for optionsData_historicalOptions: 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 MCP Avantage. Nothing to install.
optionsData_historicalOptions 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 optionsData_historicalOptions 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 optionsData_historicalOptions. 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.
optionsData_historicalOptions is provided by the MCP Avantage MCP server (missionsquad/mcp-avantage). 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.
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