Get latest news articles for a stock.
AI agents call get_stock_news 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.
This tool retrieves and queries publicly available news information. It has no side effects, does not modify data, does not execute commands or code, does not delete anything, and does not involve financial transactions. It is a straightforward read operation that fits the 'Read' category for data retrieval.
From the tool's definition Tool name 'get_stock_news' and description 'Get latest news articles for a stock' indicate a retrieval operation that queries and returns existing news data without modifying, executing code, deleting data, or moving money.
Attacks that exploit this kind of access
Get latest news articles for a stock. 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 get_stock_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 Yahoo Finance MCP Server. Nothing to install.
get_stock_news 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 get_stock_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.
Set action: deny in the PolicyLayer policy for get_stock_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.
get_stock_news is provided by the Yahoo Finance MCP Server MCP server (leo-ye0/mcp-finance-data). 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.
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