Return the most recent close, change percent, volume, PER and PBR for a ticker.
AI agents call get_stock_quote to retrieve information from Kookmin Stock without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves read-only financial data (stock quotes, metrics). It does not execute trades, move money, create/modify data, or delete anything. Even though it concerns financial markets, it is purely informational in nature with no ability to commit financial obligations or execute financial transactions.
From the tool's definition Tool name 'get_stock_quote' and description 'Return the most recent close, change percent, volume, PER and PBR for a ticker' indicate retrieval of market data without modification or execution of trades.
Attacks that exploit this kind of access
Return the most recent close, change percent, volume, PER and PBR for a ticker. It is categorised as a Read tool in the Kookmin Stock MCP Server, which means it retrieves data without modifying state.
Register the Kookmin Stock MCP server in PolicyLayer and add a rule for get_stock_quote: 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 Kookmin Stock. Nothing to install.
get_stock_quote 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_quote 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_quote. 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_quote is provided by the Kookmin Stock MCP server (jooseunghyeon/kookmin-university-mcp). 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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