AI agents call market_get_kline to retrieve information from TdxQuant MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
K-line (candlestick) data is historical market pricing information typically used for technical analysis. Retrieval of such data has no side effects, no deletion risk, and does not execute trades or move money. It is a straightforward Read operation. Confidence is slightly lowered due to the empty description, but the naming convention and server context make the classification clear.
From the tool's definition Tool name 'market_get_kline' suggests retrieval of candlestick chart (K-line) market data. The 'get_' prefix indicates a read operation. Description is empty, but the tool name and context within a financial data server strongly indicate data retrieval.
Documented attack patterns abuse exactly the kind of access market_get_kline gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and TdxQuant MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for market_get_kline:
{
"version": "1",
"default": "deny",
"tools": {
"market_get_kline": {}
}
}market_get_kline is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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market_get_kline. It is categorised as a Read tool in the TdxQuant MCP Server MCP Server, which means it retrieves data without modifying state.
Register the TdxQuant MCP Server MCP server in PolicyLayer and add a rule for market_get_kline: 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 TdxQuant MCP Server. Nothing to install.
market_get_kline 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 market_get_kline 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 market_get_kline. 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.
market_get_kline is provided by the TdxQuant MCP Server MCP server (lingfan/tdxquant-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from TdxQuant 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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39 TdxQuant MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.