AI agents call stock_fund_flow_big_deal to retrieve information from China Stock MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool appears to retrieve stock fund flow and large transaction information from Chinese exchanges. The prefix 'stock_' and query-like naming convention, combined with context from similar sibling tools on the same server, indicate a read-only data retrieval function. No side effects or state changes are implied. Low severity because misuse is limited to data access without operational or financial risk.
From the tool's definition Tool name 'stock_fund_flow_big_deal' suggests retrieval of financial flow and transaction data. Description is empty, limiting direct evidence.
Documented attack patterns abuse exactly the kind of access stock_fund_flow_big_deal gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and China Stock MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for stock_fund_flow_big_deal:
{
"version": "1",
"default": "deny",
"tools": {
"stock_fund_flow_big_deal": {}
}
}stock_fund_flow_big_deal is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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stock_fund_flow_big_deal. It is categorised as a Read tool in the China Stock MCP Server MCP Server, which means it retrieves data without modifying state.
Register the China Stock MCP Server MCP server in PolicyLayer and add a rule for stock_fund_flow_big_deal: 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 China Stock MCP Server. Nothing to install.
stock_fund_flow_big_deal 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 stock_fund_flow_big_deal 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 stock_fund_flow_big_deal. 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.
stock_fund_flow_big_deal is provided by the China Stock MCP Server MCP server (peikuo/china-stock-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from China Stock MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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351 China Stock MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.