Get comprehensive stock information including price, fundamentals, and company details
AI agents call get_stock_info to retrieve information from Financial Data 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 financial data without side effects. It gathers stock information from Yahoo Finance API but does not execute trades, modify portfolios, delete data, or commit financial obligations. The severity is low because misuse causes no harm—incorrect data interpretation might lead to poor investment decisions, but the tool itself performs no irreversible actions or financial commitments.
From the tool's definition Tool name 'get_stock_info' and description 'Get comprehensive stock information including price, fundamentals, and company details' indicate data retrieval only. Verbs are 'Get' (retrieval), with no mention of modification, deletion, or financial transactions.
Attacks that exploit this kind of access
Get comprehensive stock information including price, fundamentals, and company details. It is categorised as a Read tool in the Financial Data MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Financial Data MCP Server MCP server in PolicyLayer and add a rule for get_stock_info: 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 Financial Data MCP Server. Nothing to install.
get_stock_info 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_info 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_info. 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_info is provided by the Financial Data MCP Server MCP server (j1c4b/finance_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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