AI agents call get_macro_cpi to retrieve information from Cn Financial without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical CPI data, a read-only operation with no side effects. It queries financial/macroeconomic data similar to sibling tools like get_balance_sheet and get_company_info, all of which are data retrieval functions. There is no mechanism for write, delete, or execution capabilities, making this a simple Read category tool with low severity impact.
From the tool's definition Tool name 'get_macro_cpi' and description '获取中国CPI消费者价格指数数据（月度）' (Get China CPI consumer price index data monthly) indicate a retrieval operation that fetches macroeconomic statistics with no ability to modify, delete, or execute operations.
Documented attack patterns abuse exactly the kind of access get_macro_cpi gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Cn Financial, and nothing reaches the server without passing your rules. This is the rule we recommend for get_macro_cpi:
{
"version": "1",
"default": "deny",
"tools": {
"get_macro_cpi": {}
}
}get_macro_cpi is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
Free to start. No card required.
获取中国CPI消费者价格指数数据（月度）。. It is categorised as a Read tool in the Cn Financial MCP Server, which means it retrieves data without modifying state.
Register the Cn Financial MCP server in PolicyLayer and add a rule for get_macro_cpi: 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 Cn Financial. Nothing to install.
get_macro_cpi 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_macro_cpi 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_macro_cpi. 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_macro_cpi is provided by the Cn Financial MCP server (ccq1/cn-financial-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Cn Financial, 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.
42 Cn Financial tools catalogued and risk-classified — across an index of 43,000+ MCP servers.