AI agents call list_directory to retrieve information from MCPHub without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Directory listing is a non-destructive query operation that retrieves filesystem metadata without side effects. It enables browsing/discovery but cannot modify, delete, or execute actions. Severity is low as the information disclosed depends on filesystem permissions and access scope, with minimal blast radius for typical use cases.
From the tool's definition Tool name 'list_directory' indicates retrieval of directory contents without modification. Sibling tools include similar read operations like 'find_files' and 'get_disk_usage', consistent with a Read classification pattern.
Attacks that exploit this kind of access
list_directory. It is categorised as a Read tool in the MCPHub MCP Server, which means it retrieves data without modifying state.
Register the MCPHub 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 MCPHub. 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 MCPHub MCP server (jayden-dong/mcphub). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
list_directory is one line of MCPHub's registry record.
The record carries the whole server: verified identity, auth posture, risk grade, every tool classified, recommended policy — re-checked continuously.
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