Get recent news for a stock.
AI agents call get_news to retrieve information from yfinance 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 publicly available news data for a given stock ticker—a pure query operation with no state changes, code execution, or irreversible actions. It falls squarely into the Read category. Severity is low because news retrieval poses minimal risk even if misused by an AI agent.
From the tool's definition Tool name 'get_news' and description 'Get recent news for a stock' indicate a read-only retrieval operation. No side effects, modification, deletion, execution, or financial transaction is implied.
Attacks that exploit this kind of access
Get recent news for a stock. It is categorised as a Read tool in the yfinance MCP Server MCP Server, which means it retrieves data without modifying state.
Register the yfinance MCP Server MCP server in PolicyLayer and add a rule for get_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 yfinance MCP Server. Nothing to install.
get_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_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_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_news is provided by the yfinance MCP Server MCP server (torosent/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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