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ebowwa

Xcode MCP Server

by ebowwa

xcode_create_directory

Create directories and subdirectories in Xcode projects to organize files and manage project structure.

Instructions

Create a directory with subdirectories if needed

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pathYesDirectory path to create

Implementation Reference

  • Handler for the 'create_directory' internal command (mapped from tool 'xcode_create_directory'). Calls FileManager.createDirectory and sets success message.
    await this.fileManager.createDirectory(args.path);
    output = `Directory created successfully at: ${args.path}`;
    break;
  • Core implementation that creates the directory using fs.mkdir with recursive:true option.
    async createDirectory(dirPath: string): Promise<void> {
      await fs.mkdir(dirPath, { recursive: true });
    }
  • Dynamically generates MCP tool registrations including 'xcode_create_directory' by prefixing command names with 'xcode_' and deriving input schema from command definitions.
    generateMCPToolDefinitions(): Array<{
      name: string;
      description: string;
      inputSchema: any;
    }> {
      return Object.entries(this.commands).map(([name, command]) => ({
        name: `xcode_${name}`,
        description: command.description,
        inputSchema: {
          type: 'object',
          properties: command.parameters ? Object.fromEntries(
            Object.entries(command.parameters).map(([paramName, paramDef]) => [
              paramName,
              {
                type: paramDef.type,
                description: paramDef.description,
                ...(paramDef.default !== undefined && { default: paramDef.default })
              }
            ])
          ) : {},
          required: command.parameters ? Object.entries(command.parameters)
            .filter(([_, paramDef]) => paramDef.required)
            .map(([paramName]) => paramName) : []
        }
      }));
    }
  • Tool call handler that maps 'xcode_*' tool names to internal commands by removing prefix and dispatching to CommandExecutor.executeCommand.
    // Remove 'xcode_' prefix if present
    const commandName = name.startsWith('xcode_') ? name.slice(6) : name;
    const result = await this.commandExecutor.executeCommand(commandName, args);
  • src/index.ts:87-89 (registration)
    Registers the list of available tools (including dynamically generated xcode_* tools) with the MCP server.
    this.server.setRequestHandler(ListToolsRequestSchema, async () => ({
      tools: [...tools, ...webMonitorTools],
    }));
Behavior2/5

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It mentions creating subdirectories if needed, which adds some context, but fails to address critical aspects like permissions required, error handling (e.g., if path exists), or side effects. This is inadequate for a mutation tool with zero annotation coverage.

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 a single, efficient sentence that front-loads the core action and includes a key behavioral detail ('with subdirectories if needed'). There is no wasted verbiage, making it appropriately concise and well-structured.

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

Completeness2/5

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

Given the tool's complexity as a mutation operation with no annotations and no output schema, the description is insufficient. It lacks details on return values, error conditions, permissions, or how it integrates with other Xcode tools, leaving significant gaps for an AI agent to use it correctly.

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?

The input schema has 100% description coverage, with the 'path' parameter fully documented in the schema. The description does not add any semantic details beyond what the schema provides, such as path format examples or constraints, so it meets the baseline for high schema coverage.

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

Purpose4/5

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

The description clearly states the action ('Create a directory') and specifies behavior ('with subdirectories if needed'), making the purpose understandable. However, it doesn't differentiate from sibling tools like 'xcode_create_project' or 'xcode_create_swift_file' beyond the resource type, missing explicit sibling distinction.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool versus alternatives. The description lacks context about prerequisites, when-not-to-use scenarios, or comparisons to other file/directory creation tools in the sibling list, offering only basic functional information.

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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