Get a detailed listing of all files and directories in a specified path.
AI agents call list_directory to retrieve information from MCP-Server-Filesystem without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool performs a read-only query operation that lists files and directories. It does not create, modify, delete, or execute anything—it merely retrieves and presents information about the filesystem structure. The low severity reflects minimal risk; an agent listing directories cannot cause data loss or unintended state changes, only gather information about what exists on the filesystem.
From the tool's definition Tool name 'list_directory' and description 'Get a detailed listing of all files and directories in a specified path' indicate retrieval of directory contents with no side effects.
Risk signalsBulk/mass operation — affects multiple targets
Attacks that exploit this kind of access
Get a detailed listing of all files and directories in a specified path. It is categorised as a Read tool in the MCP-Server-Filesystem MCP Server, which means it retrieves data without modifying state.
Register the MCP-Server-Filesystem 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-Server-Filesystem. 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-Server-Filesystem MCP server (redf0x1/mcp-server-filesystem). 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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