Get ESG (Environmental, Social, Governance) sustainability scores for a stock.
AI agents call get_esg_data to retrieve information from yfinance MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves pre-computed ESG sustainability scores from Yahoo Finance for a given stock ticker. It has no side effects—it does not create, modify, delete, or execute code. The data returned is read-only financial information. Misuse by an AI agent (e.g., requesting ESG data for many tickers) poses minimal risk—at worst, API rate-limiting or benign information disclosure.
From the tool's definition Tool name 'get_esg_data' and description 'Get ESG... sustainability scores' indicate data retrieval with no modification, deletion, or execution of external operations. This is a straightforward query operation.
Attacks that exploit this kind of access
Get ESG (Environmental, Social, Governance) sustainability scores for a stock. It is categorised as a Read tool in the yfinance MCP Server MCP Server, which means it retrieves data without modifying state.
Register the yfinance MCP Server MCP server in PolicyLayer and add a rule for get_esg_data: 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 yfinance MCP Server. Nothing to install.
get_esg_data 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_esg_data 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_esg_data. 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_esg_data is provided by the yfinance MCP Server MCP server (torosent/yfinance-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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