AI agents call get_stock_quote to retrieve information from MCP Demo without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves stock price information (bid/ask quotes) from an external data source. It performs a read-only query operation with no side effects, no code execution, no data modification, and no financial transactions (merely fetching publicly available market data for informational purposes). This is a straightforward Read category tool with low risk.
From the tool's definition Tool name 'get_stock_quote' and description 'Get stock bid and ask quotes from East Money' indicate data retrieval with no modification, deletion, or financial transaction capability. The action is querying current market data.
Attacks that exploit this kind of access
Get stock bid and ask quotes from East Money. It is categorised as a Read tool in the MCP Demo MCP Server, which means it retrieves data without modifying state.
Register the MCP Demo 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 MCP Demo. 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 MCP Demo MCP server (lakyia/mcpdemo). 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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