AI agents call get_zz500_stocks to retrieve information from Ashare without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves static reference data (index constituents) from a financial data API. It queries and returns information without side effects, matching the Read category definition. The blast radius is minimal—misuse would only return incorrect or stale stock lists, not cause financial harm or data loss.
From the tool's definition Tool name 'get_zz500_stocks' and description 'CSI 500 constituents on `date`' indicates data retrieval only. The verb 'get' and the passive framing ('constituents... on date') show no modification, deletion, execution, or financial operations.
Attacks that exploit this kind of access
CSI 500 (中证500) constituents on date (default latest). It is categorised as a Read tool in the Ashare MCP Server, which means it retrieves data without modifying state.
Register the Ashare MCP server in PolicyLayer and add a rule for get_zz500_stocks: 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 Ashare. Nothing to install.
get_zz500_stocks 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_zz500_stocks 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_zz500_stocks. 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_zz500_stocks is provided by the Ashare MCP server (maimai-hqw/ashare-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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