stock_options
Daily 30-day implied volatility history for one company. Requires FolioFact Pro.
This record as markdown: /tools/com-foliofact-foliofact/stock-options.md
What stock_options does on FolioFact
AI agents call stock_options to retrieve information from FolioFact without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
ticker | string | Yes | Stock ticker (dots allowed). |
Parameters from the server's own tool schema.
Why stock_options is rated Low
Even though stock_options only reads data, uncontrolled read access leaks sensitive information and racks up API costs: an agent caught in a retry loop can make thousands of calls a minute without anyone noticing.
Attacks that exploit this kind of access
The rule that runs stock_options safely
PolicyLayer is an MCP gateway: it sits between your AI agents and FolioFact, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For stock_options, this is the rule to start with:
stock_options 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 FolioFact, apply this rule, and every stock_options call is checked against it from then on.
Questions about stock_options
Daily 30-day implied volatility history for one company. Requires FolioFact Pro. It is categorised as a Read tool in the FolioFact MCP Server, which means it retrieves data without modifying state.
stock_options accepts 1 parameter: ticker. Required: ticker. The full parameter table on this page comes from the server's own tool schema.
Register the FolioFact MCP server in PolicyLayer and add a rule for stock_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 FolioFact. Nothing to install.
stock_options 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 stock_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.
Set action: deny in the PolicyLayer policy for stock_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.
stock_options is provided by the FolioFact MCP server (https://foliofact.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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