Returns the list of directories that this server is allowed to access.
AI agents call list_allowed_directories 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 retrieves configuration or metadata about filesystem access permissions. It reads and returns information without modifying, creating, deleting, executing, or affecting any data or system state. This is a straightforward informational read operation with minimal blast radius if misused by an AI agent.
From the tool's definition Tool name 'list_allowed_directories' and description 'Returns the list of directories that this server is allowed to access' indicate a query/retrieval operation with no side effects.
Attacks that exploit this kind of access
Returns the list of directories that this server is allowed to access. 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_allowed_directories: 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_allowed_directories 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_allowed_directories 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_allowed_directories. 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_allowed_directories 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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