get_yahoo_finance_news · MCP YFinance Stock Server MCP

WHAT IT DOES

What get_yahoo_finance_news does on MCP YFinance Stock Server

AI agents call get_yahoo_finance_news to retrieve information from MCP YFinance Stock Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

WHY IT NEEDS A POLICY

Why get_yahoo_finance_news needs a policy

The 'get_' prefix and context strongly suggest this fetches news data from Yahoo Finance without modification, deletion, or execution of external operations. No side effects beyond data retrieval are implied. Severity is low because news retrieval poses minimal risk even if misused by an agent.

From the tool's definition Tool name 'get_yahoo_finance_news' indicates data retrieval. Server description emphasizes 'retrieve real-time stock data' and 'tracking'; sibling tools are all read-only financial queries (get_historical_stock_prices, get_financial_statement,…

Attacks that exploit this kind of access

Questions about get_yahoo_finance_news

What does the get_yahoo_finance_news tool do? +

get_yahoo_finance_news. It is categorised as a Read tool in the MCP YFinance Stock Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_yahoo_finance_news? +

Register the MCP YFinance Stock Server MCP server in PolicyLayer and add a rule for get_yahoo_finance_news: 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 YFinance Stock Server. Nothing to install.

What risk level is get_yahoo_finance_news? +

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

Can I rate-limit get_yahoo_finance_news? +

Yes. Add a rate_limit block to the get_yahoo_finance_news 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_yahoo_finance_news completely? +

Set action: deny in the PolicyLayer policy for get_yahoo_finance_news. 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_yahoo_finance_news? +

get_yahoo_finance_news is provided by the MCP YFinance Stock Server MCP server (sauniket/mcp-yfinance-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.