directory_tree
AI agents call directory_tree to retrieve information from Portable MCP Toolkit without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves or enumerates a filesystem directory structure without modifying it. This is a read-only operation with no side effects. Confidence is slightly reduced because the description is empty, but the name and context from sibling tools strongly suggest a safe retrieval function.
From the tool's definition Tool name 'directory_tree' indicates retrieval of directory structure; sibling tools are predominantly Read (search_code_semantic, read_file_full, get_code_context, analyze_code_patterns) and Write (generate_code, index_workspace).
Attacks that exploit this kind of access
directory_tree. It is categorised as a Read tool in the Portable MCP Toolkit MCP Server, which means it retrieves data without modifying state.
Register the Portable MCP Toolkit MCP server in PolicyLayer and add a rule for directory_tree: 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 Portable MCP Toolkit. Nothing to install.
directory_tree 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 directory_tree 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 directory_tree. 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.
directory_tree is provided by the Portable MCP Toolkit MCP server (mjdevaccount/aistack-mcp). 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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