Search financial news by symbol or keyword using Finnhub.
AI agents call search_news to retrieve information from IB Portfolio Tracker MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool queries external financial news data (via Finnhub API) and returns results to the user. It performs no creation, modification, deletion, code execution, or financial transactions. The search operation is read-only and non-destructive.
From the tool's definition Tool name is 'search_news' and description states it 'Search[es] financial news by symbol or keyword using Finnhub.' This is purely a data retrieval operation with no side effects.
Attacks that exploit this kind of access
Search financial news by symbol or keyword using Finnhub. It is categorised as a Read tool in the IB Portfolio Tracker MCP Server MCP Server, which means it retrieves data without modifying state.
Register the IB Portfolio Tracker MCP Server MCP server in PolicyLayer and add a rule for search_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 IB Portfolio Tracker MCP Server. Nothing to install.
search_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 search_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 search_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.
search_news is provided by the IB Portfolio Tracker MCP Server MCP server (vinbg/ib-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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