AI agents call search_stocks to retrieve information from Smart Financial without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool searches for and retrieves stock information—a pure data retrieval operation with no side effects. It does not create, modify, delete, or execute any actions. Even in a financial context, read-only access to public market data poses minimal risk. The severity is low because misuse would only return existing financial information without causing financial loss or irreversible changes.
From the tool's definition Tool name 'search_stocks' and description '搜索股票' (search stocks) indicates a query operation that retrieves stock information.
Documented attack patterns abuse exactly the kind of access search_stocks gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Smart Financial, and nothing reaches the server without passing your rules. This is the rule we recommend for search_stocks:
{
"version": "1",
"default": "deny",
"tools": {
"search_stocks": {}
}
}search_stocks is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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搜索股票. It is categorised as a Read tool in the Smart Financial MCP Server, which means it retrieves data without modifying state.
Register the Smart Financial MCP server in PolicyLayer and add a rule for search_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 Smart Financial. Nothing to install.
search_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 search_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 search_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.
search_stocks is provided by the Smart Financial MCP server (yuhai0/smart-financial-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from Smart Financial, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
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12 Smart Financial tools catalogued and risk-classified — across an index of 43,000+ MCP servers.