yfinance_get_ticker_info
AI agents call yfinance_get_ticker_info to retrieve information from Yahoo Finance MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The 'get_' prefix and ticker info context strongly suggest this fetches and returns ticker information without modifying data. No description provided reduces confidence slightly, but the pattern of sibling tools and naming convention confirm this is a read operation. Severity is low because retrieving financial data has minimal blast radius—it cannot delete, modify, or commit financial transactions.
From the tool's definition Tool name 'yfinance_get_ticker_info' indicates a getter/retrieval operation; consistent with other sibling tools on the server (yfinance_get_financials, yfinance_get_holders, yfinance_get_price_history, yfinance_get_ticker_news) which are all read-only data…
Attacks that exploit this kind of access
yfinance_get_ticker_info. It is categorised as a Read tool in the Yahoo Finance MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Yahoo Finance MCP Server MCP server in PolicyLayer and add a rule for yfinance_get_ticker_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 Yahoo Finance MCP Server. Nothing to install.
yfinance_get_ticker_info 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 yfinance_get_ticker_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.
Set action: deny in the PolicyLayer policy for yfinance_get_ticker_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.
yfinance_get_ticker_info is provided by the Yahoo Finance MCP Server MCP server (narumiruna/yfinance-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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