AI agents call stock_info_bj_name_code 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.
Based on the naming convention and the pattern of sibling tools on this server (all prefixed 'stock_a_' and performing data queries like 'pb', 'statistics', 'high_low_statistics'), this tool almost certainly retrieves or looks up stock information without modifying data. The tool appears to map stock names to codes or vice versa, a pure read operation.
From the tool's definition Tool name 'stock_info_bj_name_code' suggests a lookup function returning stock information (name/code mapping). The suffix pattern matches sibling tools (stock_a_*) which are all data retrieval operations. Description is empty, limiting precision.
Documented attack patterns abuse exactly the kind of access stock_info_bj_name_code 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_info_bj_name_code:
{
"version": "1",
"default": "deny",
"tools": {
"stock_info_bj_name_code": {}
}
}stock_info_bj_name_code is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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stock_info_bj_name_code. 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_info_bj_name_code: 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_info_bj_name_code 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_info_bj_name_code 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_info_bj_name_code. 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_info_bj_name_code 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.