指定されたディレクトリの内容を一覧表示します（許可されたディレクトリのみ）
AI agents call list_directory to retrieve information from Simple MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only reads and enumerates directory contents within pre-restricted paths. It performs no modifications, executions, or deletions. The security features mentioned in the server description (access restricted to safe directories only) further mitigate risk. Misuse impact is limited to information disclosure of permitted directory structures.
From the tool's definition Tool name is 'list_directory' and description indicates it 'lists the contents of a specified directory' with explicit restriction to 'permitted directories only'. This is a retrieval operation with no side effects.
Attacks that exploit this kind of access
指定されたディレクトリの内容を一覧表示します（許可されたディレクトリのみ）. It is categorised as a Read tool in the Simple MCP Server MCP Server, which means it retrieves data without modifying state.
Register the Simple MCP Server 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 Simple MCP Server. 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 Simple MCP Server MCP server (p-united/mcpsample). 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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