AI agents call get_growth_rates 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 and queries financial growth indicators such as revenue growth rate and net profit growth rate. It performs a read-only operation on financial data with no side effects, reversible modifications, code execution, destructive actions, or financial transactions.
From the tool's definition Tool name 'get_growth_rates' and description '获取成长性指标（营收增长率、净利润增长率等）' [Get growth metrics (revenue growth rate, net profit growth rate, etc.)] indicate retrieval of financial metrics with no data modification.
Documented attack patterns abuse exactly the kind of access get_growth_rates 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_growth_rates:
{
"version": "1",
"default": "deny",
"tools": {
"get_growth_rates": {}
}
}get_growth_rates is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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获取成长性指标（营收增长率、净利润增长率等）。. 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_growth_rates: 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_growth_rates 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_growth_rates 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_growth_rates. 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_growth_rates 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.