AI agents call get_stock_filter to retrieve information from 富途 MCP 服务器 (Futu MCP Server) without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This is a data retrieval tool that filters and returns stock information based on user-specified criteria (attributes and technical indicators). It has no side effects—it only queries and returns filtered results. The sibling tools like 'place_order' and 'modify_order' are distinct Write/Execute operations, while this tool is purely read-only.
From the tool's definition Tool name 'get_stock_filter' and description '条件选股，支持多种属性和技术指标筛选' (conditional stock filtering, supporting multiple attributes and technical indicators filtering) indicate a query/retrieval operation.
Documented attack patterns abuse exactly the kind of access get_stock_filter gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and 富途 MCP 服务器 (Futu MCP Server), and nothing reaches the server without passing your rules. This is the rule we recommend for get_stock_filter:
{
"version": "1",
"default": "deny",
"tools": {
"get_stock_filter": {}
}
}get_stock_filter is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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条件选股，支持多种属性和技术指标筛选. It is categorised as a Read tool in the 富途 MCP 服务器 (Futu MCP Server) MCP Server, which means it retrieves data without modifying state.
Register the 富途 MCP 服务器 (Futu MCP Server) MCP server in PolicyLayer and add a rule for get_stock_filter: 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 富途 MCP 服务器 (Futu MCP Server). Nothing to install.
get_stock_filter 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_stock_filter 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_stock_filter. 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_stock_filter is provided by the 富途 MCP 服务器 (Futu MCP Server) MCP server (shuchaang/futu-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from 富途 MCP 服务器 (Futu 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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10 富途 MCP 服务器 (Futu MCP Server) tools catalogued and risk-classified — across an index of 43,000+ MCP servers.