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koopatroopa787

MCP PC Control Server

create_directory

Create new directories or verify existing ones on your PC, including nested folders in a single operation. This tool manages directory structures for file organization and system control.

Instructions

Create a new directory or ensure a directory exists. Can create multiple nested directories in one operation. If the directory already exists, this operation will succeed silently.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathYesThe path of the directory to create

Implementation Reference

  • The switch case handler for the 'create_directory' tool. It extracts the path from arguments, creates the directory using fs.mkdir with recursive: true, and returns a success message.
    case "create_directory": {
      const dirPath = args.path as string;
      await fs.mkdir(dirPath, { recursive: true });
      return {
        content: [
          {
            type: "text",
            text: `Successfully created directory ${dirPath}`,
          },
        ],
      };
    }
  • src/index.ts:84-97 (registration)
    Registration of the 'create_directory' tool in the TOOLS array. Defines the name, description, and input schema (path: string).
    {
      name: "create_directory",
      description: "Create a new directory or ensure a directory exists. Can create multiple nested directories in one operation. If the directory already exists, this operation will succeed silently.",
      inputSchema: {
        type: "object",
        properties: {
          path: {
            type: "string",
            description: "The path of the directory to create",
          },
        },
        required: ["path"],
      },
    },
Behavior4/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden and does well by disclosing key behavioral traits: it can create nested directories, succeeds silently if the directory exists, and performs a write operation. However, it lacks details on permissions, error conditions, or side effects.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is front-loaded with the core purpose, followed by important behavioral details in two concise sentences. Every sentence earns its place by adding value without redundancy, making it efficient and well-structured.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's moderate complexity (write operation with one parameter) and no annotations or output schema, the description is fairly complete: it covers purpose, behavior, and parameter implications. However, it could improve by addressing permissions or error handling for full contextual coverage.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100%, so the schema already documents the 'path' parameter. The description adds some context by implying the path can include nested directories, but does not provide additional syntax or format details beyond what the schema offers. Baseline 3 is appropriate as the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the specific action ('create a new directory or ensure a directory exists') and resource ('directory'), distinguishing it from siblings like delete_directory or list_directory. It precisely defines the verb and scope of the operation.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides clear context about when to use it ('create a new directory or ensure a directory exists') and its behavior with existing directories, but does not explicitly mention when not to use it or name alternative tools. It implies usage for directory creation needs without specifying alternatives.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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