get_stock_info · MCP YFinance Stock Server MCP

WHAT IT DOES

What get_stock_info does on MCP YFinance Stock Server

AI agents call get_stock_info 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_stock_info needs a policy

This tool retrieves stock information without side effects. No description is provided, but naming convention and sibling tool patterns strongly indicate it queries stock data from Yahoo Finance API. The worst-case misuse is an AI agent requesting excessive data or querying sensitive ticker information, neither of which causes harm to systems or data integrity. Confidence is slightly reduced (0.85 vs.

From the tool's definition Tool name 'get_stock_info' and server context indicate data retrieval operation. Server description emphasizes 'retrieve real-time stock data' and 'tracking' functions.

Attacks that exploit this kind of access

Questions about get_stock_info

What does the get_stock_info tool do? +

get_stock_info. 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_stock_info? +

Register the MCP YFinance Stock Server MCP server in PolicyLayer and add a rule for get_stock_info: 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_stock_info? +

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

Can I rate-limit get_stock_info? +

Yes. Add a rate_limit block to the get_stock_info 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_stock_info completely? +

Set action: deny in the PolicyLayer policy for get_stock_info. 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_stock_info? +

get_stock_info 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.