Returns the list of directories that this server is allowed to access.
AI agents call list_allowed_directories to retrieve information from Filesystem MCP Server (HTTP Streaming) 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 returns information about allowed directory paths. It has no side effects, cannot modify or delete data, and does not execute operations. It is purely informational, making it a Read category tool. Severity is low because the information disclosed (accessible directory paths) is typically non-sensitive operational metadata, and misuse would not cause data loss or unwanted modifications.
From the tool's definition Tool name 'list_allowed_directories' and description 'Returns the list of directories' indicates a query operation that retrieves configuration/metadata without modifying state.
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 Filesystem MCP Server (HTTP Streaming) MCP Server, which means it retrieves data without modifying state.
Register the Filesystem MCP Server (HTTP Streaming) 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 Filesystem MCP Server (HTTP Streaming). 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 Filesystem MCP Server (HTTP Streaming) MCP server (jeswin/mcpfs). 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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