List all Python files in a directory or subdirectory.
AI agents call list_directory to retrieve information from MCP Python Interpreter without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves directory structure and file names. It performs no write, delete, execute, or financial operations. The read operation has minimal blast radius as it only exposes filesystem metadata about Python files in a specified directory.
From the tool's definition Tool lists files in a directory with no modification capability. Description states 'List all Python files' - a retrieval operation with no side effects.
Attacks that exploit this kind of access
List all Python files in a directory or subdirectory. It is categorised as a Read tool in the MCP Python Interpreter MCP Server, which means it retrieves data without modifying state.
Register the MCP Python Interpreter MCP server in PolicyLayer and add a rule for list_directory: 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 MCP Python Interpreter. Nothing to install.
list_directory 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_directory 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_directory. 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_directory is provided by the MCP Python Interpreter MCP server (luutuankiet/mcp-python-interpreter). 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.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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