Create a directory in the workspace. Automatically creates parent directories if they do not exist. Idempotent - succeeds even if directory already exists.
AI agents use create_folder to create or update resources in MCP Workspace Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your MCP Workspace Server environment.
Creating directories is a reversible write operation with minimal blast radius. Directories can be deleted if created in error, and the operation has no side effects beyond filesystem structure changes within the sandboxed workspace. Low severity because directory creation alone poses minimal risk unless combined with other tools to write malicious content.
From the tool's definition Tool description explicitly states 'Create a directory' and 'Automatically creates parent directories if they do not exist.' The idempotent nature (succeeds even if directory already exists) confirms reversible modification rather than destructive action.
Attacks that exploit this kind of access
Create a directory in the workspace. Automatically creates parent directories if they do not exist. Idempotent - succeeds even if directory already exists. It is categorised as a Write tool in the MCP Workspace Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MCP Workspace Server MCP server in PolicyLayer and add a rule for create_folder: 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 Workspace Server. Nothing to install.
create_folder is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_folder 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 create_folder. 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.
create_folder is provided by the MCP Workspace Server MCP server (shayyeffet/ultimate_mcp_server). 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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