List all files in a Python package.
AI agents call list_package_files to retrieve information from PyPI Package 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 directory/file information from a package without executing code, modifying data, or causing side effects. It is a simple query operation analogous to listing directory contents. The blast radius of misuse is minimal—an agent could only enumerate package contents, which is already public information on PyPI.
From the tool's definition Tool name 'list_package_files' and description 'List all files in a Python package' indicate a retrieval operation with no modification or execution capability.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
List all files in a Python package. It is categorised as a Read tool in the PyPI Package MCP Server MCP Server, which means it retrieves data without modifying state.
Register the PyPI Package MCP Server MCP server in PolicyLayer and add a rule for list_package_files: 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 Package MCP Server. Nothing to install.
list_package_files 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 list_package_files 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 list_package_files. 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.
list_package_files is provided by the PyPI Package MCP Server MCP server (qvakk/python-package-mcp-server). 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.
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