get_option_expiration_dates

Fetch the available options expiration dates for a given ticker symbol.

SERVERYahoo Finance MCP Server SOURCE16coffee/finance-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/16coffee-finance-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 financial metadata (expiration dates for options contracts) without creating, modifying, deleting, or executing any financial transactions. It is a read-only operation that retrieves public market information. The blast radius of misuse is minimal—an agent could only retrieve dates, not execute trades or move funds.

From the tool's definition Tool name 'get_option_expiration_dates' and description 'Fetch the available options expiration dates' indicate a data retrieval operation with no modification, deletion, 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? +

Fetch the available options expiration dates for a given ticker 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 (16coffee/finance-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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