get_holder_info
AI agents call get_holder_info to retrieve information from MCP YFinance Stock Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves data about stock holders/ownership without modifying any data. The verb 'get' and context of a financial data aggregation server indicate a read operation. Although the description is empty, the naming convention and sibling tools strongly suggest this retrieves public financial holder information. Confidence is moderately high but not critical due to lack of explicit description.
From the tool's definition Tool name is 'get_holder_info', which follows the 'get_' prefix pattern consistent with other read-only tools on this server (get_bollinger_bands, get_financial_statement, get_historical_stock_prices, get_macd, get_moving_averages, get_recommendations,…
Attacks that exploit this kind of access
get_holder_info. It is categorised as a Read tool in the MCP YFinance Stock Server MCP Server, which means it retrieves data without modifying state.
Register the MCP YFinance Stock Server MCP server in PolicyLayer and add a rule for get_holder_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 MCP YFinance Stock Server. Nothing to install.
get_holder_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_holder_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_holder_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_holder_info is provided by the MCP YFinance Stock Server MCP server (sauniket/mcp-yfinance-server). 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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