AI agents call get_limit_up_list to retrieve information from Sfc Data without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a data retrieval operation—querying a list of stocks that hit price limits, optionally filtered by board type and consecutive limit-up counts. It has no side effects, does not modify data, execute code, or involve financial transactions. It is a straightforward read operation typical of market data APIs.
From the tool's definition Tool name 'get_limit_up_list' and description indicating it retrieves/lists limit-up stocks filtered by board status. The verb 'get' and action of retrieving data ('获取涨停股票列表') with filtering options indicates querying without modification.
Attacks that exploit this kind of access
获取涨停股票列表（按连板状态筛选：主板、1连2、2连3等）. It is categorised as a Read tool in the Sfc Data MCP Server, which means it retrieves data without modifying state.
Register the Sfc Data MCP server in PolicyLayer and add a rule for get_limit_up_list: 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 Sfc Data. Nothing to install.
get_limit_up_list 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_limit_up_list 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_limit_up_list. 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_limit_up_list is provided by the Sfc Data MCP server (yangxinagfeng123/sfc-data-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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