AI agents call stock_a_all_pb 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 fetch or list stock valuation metrics (P/B ratios) from Chinese stock exchanges. It retrieves data without modifying, deleting, or executing operations. The absence of a description slightly lowers confidence, but the consistent pattern of sibling tools (all Read operations) and the descriptive name strongly suggest read-only data retrieval.
From the tool's definition Tool name 'stock_a_all_pb' suggests retrieving Price-to-Book ratio data for all A-shares; sibling tools are all data retrieval operations (statistics, indicators, news reports).
Documented attack patterns abuse exactly the kind of access stock_a_all_pb 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_a_all_pb:
{
"version": "1",
"default": "deny",
"tools": {
"stock_a_all_pb": {}
}
}stock_a_all_pb is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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stock_a_all_pb. 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_a_all_pb: 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_a_all_pb 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_a_all_pb 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_a_all_pb. 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_a_all_pb 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.
Free to start. No card required.
351 China Stock MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.