qlib_download_data · Qlib MCP: Risk & Policy

WHAT IT DOES

What qlib_download_data does on Qlib

AI agents use qlib_download_data to create or update resources in Qlib — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Qlib environment.

WHY IT NEEDS A POLICY

Why qlib_download_data needs a policy

This tool downloads and writes a large dataset (up to 2GB) to the local filesystem. It is a Write operation (creates new files on disk) rather than Destructive (no deletion implied) or Execute (no code execution). Misuse could fill disk space or overwrite existing data, giving it medium severity.

From the tool's definition 下载 Qlib 示例数据集到本地（约 500MB~2GB）— 'download' data to local storage, writing 500MB–2GB of files

Attacks that exploit this kind of access

Recommended rule Ready

Verdict

qlib_download_data Rate-limited

qlib_download_data stays usable, but capped — an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "qlib_download_data": {
      "limits": [
        {
          "counter": "qlib_download_data_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL →

Instant setup, no code required.

PolicyLayer is an MCP gateway: every tool call is checked against your rule before it reaches Qlib, so you can run agents against it safely.

FAQ

Questions about qlib_download_data

What does the qlib_download_data tool do? +

下载 Qlib 示例数据集到本地（约 500MB~2GB）。. It is categorised as a Write tool in the Qlib MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on qlib_download_data? +

Register the Qlib MCP server in PolicyLayer and add a rule for qlib_download_data: 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 Qlib. Nothing to install.

What risk level is qlib_download_data? +

qlib_download_data is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit qlib_download_data? +

Yes. Add a rate_limit block to the qlib_download_data 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.

How do I block qlib_download_data completely? +

Set action: deny in the PolicyLayer policy for qlib_download_data. 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.

What MCP server provides qlib_download_data? +

qlib_download_data is provided by the Qlib MCP server (lsj210001/qlib-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.