AI agents call get_us_market_indices to retrieve information from Stockreport without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves financial market data (US stock indices) without modifying, deleting, or executing operations. It is a straightforward data query operation similar to sibling tools like 'get_historical_k_data' and 'get_dividend_data'. Accessing publicly available market index information poses minimal security risk and falls clearly into the Read category.
From the tool's definition Tool name 'get_us_market_indices' and description indicating retrieval of US market index information ('获取美股主要指数信息' = 'Get US stock market main indices information').
Documented attack patterns abuse exactly the kind of access get_us_market_indices gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Stockreport, and nothing reaches the server without passing your rules. This is the rule we recommend for get_us_market_indices:
{
"version": "1",
"default": "deny",
"tools": {
"get_us_market_indices": {}
}
}get_us_market_indices is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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获取美股主要指数信息. It is categorised as a Read tool in the Stockreport MCP Server, which means it retrieves data without modifying state.
Register the Stockreport MCP server in PolicyLayer and add a rule for get_us_market_indices: 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 Stockreport. Nothing to install.
get_us_market_indices 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_us_market_indices 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_us_market_indices. 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_us_market_indices is provided by the Stockreport MCP server (jamesdingai/stockreport-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Stockreport, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
34 Stockreport tools catalogued and risk-classified — across an index of 43,000+ MCP servers.