AI agents call get_download_trends to retrieve information from PyPI Query MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves historical download trend data from PyPI without modifying, executing, deleting, or moving resources. It has no side effects and falls squarely into the Read category. Severity is low because misuse only exposes non-sensitive aggregate public data about package popularity.
From the tool's definition Tool name 'get_download_trends' indicates a retrieval operation. Server description states the tool supports 'trending analysis' and 'download statistics', which are read-only query operations.
Documented attack patterns abuse exactly the kind of access get_download_trends gives an agent:
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_download_trends:
{
"version": "1",
"default": "deny",
"tools": {
"get_download_trends": {}
}
}get_download_trends is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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get_download_trends. It is categorised as a Read tool in the PyPI Query MCP Server MCP Server, which means it retrieves data without modifying state.
Register the PyPI Query MCP Server MCP server in PolicyLayer and add a rule for get_download_trends: 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.
get_download_trends 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_download_trends 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_download_trends. 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_download_trends 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.
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.
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10 PyPI Query MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.