AI agents call get_stock_news to retrieve information from Finviz 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 news data associated with stocks. It is a read-only operation that queries and returns information without side effects, fitting the Read category. The Finviz server context (stock screening, analysis, SEC filings) confirms this is a data retrieval tool. Severity is low because retrieving public news poses minimal risk even if misused by an agent.
From the tool's definition Tool name 'get_stock_news' and description indicating retrieval of stock-related news ('銘柄関連ニュースの取得' = 'retrieve stock-related news'). No modification, deletion, or execution of external operations.
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 Finviz MCP Server, 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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銘柄関連ニュースの取得. It is categorised as a Read tool in the Finviz MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Finviz 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 Finviz 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 Finviz MCP Server MCP server (tradermonty/finviz-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 35 Finviz MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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35 Finviz MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.