get_option_expiration_dates

Get available option expiration dates for a given stock symbol.

SERVERYahoo Finance MCP Server SOURCEa05031113/yahoo-fianace-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade A, identity unverified Pull the record →

This record as markdown: /tools/a05031113-yahoo-fianace-mcp/get-option-expiration-dates.md

WHAT IT DOES

What get_option_expiration_dates does on Yahoo Finance MCP Server

AI agents call get_option_expiration_dates to retrieve information from Yahoo Finance MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why get_option_expiration_dates is rated Low

This tool queries and returns option expiration date information for a stock. It performs a read-only operation that retrieves data with no side effects, no code execution, no data modification, and no financial transactions. The data retrieved is publicly available market metadata.

From the tool's definition Tool name 'get_option_expiration_dates' and description 'Get available option expiration dates for a given stock symbol' indicate retrieval of publicly available market data without modification or execution of trades.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs get_option_expiration_dates safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Yahoo Finance MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For get_option_expiration_dates, this is the rule to start with:

get_option_expiration_dates Allowed

get_option_expiration_dates is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_option_expiration_dates": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Yahoo Finance MCP Server, apply this rule, and every get_option_expiration_dates call is checked against it from then on.

FAQ

Questions about get_option_expiration_dates

What does the get_option_expiration_dates tool do? +

Get available option expiration dates for a given stock symbol. It is categorised as a Read tool in the Yahoo Finance MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_option_expiration_dates? +

Register the Yahoo Finance MCP Server MCP server in PolicyLayer and add a rule for get_option_expiration_dates: 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 Yahoo Finance MCP Server. Nothing to install.

What risk level is get_option_expiration_dates? +

get_option_expiration_dates is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_option_expiration_dates? +

Yes. Add a rate_limit block to the get_option_expiration_dates 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.

How do I block get_option_expiration_dates completely? +

Set action: deny in the PolicyLayer policy for get_option_expiration_dates. 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.

What MCP server provides get_option_expiration_dates? +

get_option_expiration_dates is provided by the Yahoo Finance MCP Server MCP server (a05031113/yahoo-fianace-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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