AI agents call get_stock_news to retrieve information from Stock Info Service without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves financial news related to stocks. Despite the empty description, the name and server context strongly suggest a read-only operation that queries or fetches news data. There is no indication of side effects, modifications, deletions, or financial transactions. This is consistent with sibling tools like 'get_finance_news' and 'get_stock_info' which are clearly read operations.
From the tool's definition Tool name 'get_stock_news' and server context 'Stock Info Service' that 'provides stock data including historical prices, fundamental information, and financial news' indicate a data retrieval operation.
Documented attack patterns abuse exactly the kind of access get_stock_news gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Stock Info Service, and nothing reaches the server without passing your rules. This is the rule we recommend for get_stock_news:
{
"version": "1",
"default": "deny",
"tools": {
"get_stock_news": {}
}
}get_stock_news is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_stock_news. It is categorised as a Read tool in the Stock Info Service MCP Server, which means it retrieves data without modifying state.
Register the Stock Info Service 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 Stock Info Service. 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 Stock Info Service MCP server (tddt/stock_info_mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Stock Info Service, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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7 Stock Info Service tools catalogued and risk-classified — across an index of 43,000+ MCP servers.