get_top_downloaded_packages

THE RISK

Low Risk

Why get_top_downloaded_packages needs a policy

This tool queries and retrieves publicly available PyPI package download data without modifying, executing, or deleting anything. It returns informational metrics only. The empty description reduces confidence slightly, but the naming convention and context from sibling tools confirm this is a passive read operation with minimal security risk.

From the tool's definition Tool name 'get_top_downloaded_packages' indicates retrieval of download statistics; server description states it 'Supports advanced dependency analysis, download statistics, and trending analysis'; sibling tools like 'get_download_statistics' and…

Documented attack patterns abuse exactly the kind of access get_top_downloaded_packages gives an agent:

POLICY

How to control get_top_downloaded_packages

PolicyLayer is an MCP gateway — it sits between your AI agents and PyPI Query MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for get_top_downloaded_packages:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_top_downloaded_packages": {}
  }
}

get_top_downloaded_packages is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register PyPI Query MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_top_downloaded_packages

What does the get_top_downloaded_packages tool do? +

get_top_downloaded_packages. It is categorised as a Read tool in the PyPI Query MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_top_downloaded_packages? +

Register the PyPI Query MCP Server MCP server in PolicyLayer and add a rule for get_top_downloaded_packages: 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 PyPI Query MCP Server. Nothing to install.

What risk level is get_top_downloaded_packages? +

get_top_downloaded_packages is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_top_downloaded_packages? +

Yes. Add a rate_limit block to the get_top_downloaded_packages 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 get_top_downloaded_packages completely? +

Set action: deny in the PolicyLayer policy for get_top_downloaded_packages. 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 get_top_downloaded_packages? +

get_top_downloaded_packages is provided by the PyPI Query MCP Server MCP server (loonghao/pypi-query-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every PyPI Query MCP Server tool call.

Start from PyPI Query MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →