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Xcode MCP Server

Xcode MCP Server

by ebowwa
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
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xcode_create_swift_file

Create a new Swift source file with specified content at a designated path for Xcode projects.

Instructions

Create a new Swift source file with content

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "file_path": "<file_path>",
      "content": "<content>"
    },
    "name": "xcode_create_swift_file"
  }
}

Input Schema

NameRequiredDescriptionDefault
file_pathYesPath where the Swift file should be created
contentYesSwift code content for the file

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observed

TDQS

C2.9/5.0
Behavior2/5

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

With no annotations provided, the description carries full burden for behavioral disclosure. It states 'Create' implies a write operation but doesn't mention permissions needed, whether it overwrites existing files, error handling, or file system impacts. 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 purpose without unnecessary words. Every part ('Create a new Swift source file with content') directly contributes to understanding the tool's function.

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 this is a mutation tool with no annotations and no output schema, the description is incomplete. It lacks behavioral details (e.g., file creation behavior, error cases) and doesn't explain what happens upon success or failure, making it insufficient for safe and effective use by an agent.

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%, with both parameters ('file_path' and 'content') well-documented in the schema. The description adds no additional parameter semantics beyond implying the file contains Swift code, which is already clear from the tool name and schema. Baseline 3 is appropriate when schema does the heavy lifting.

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') and resource ('new Swift source file with content'), making the purpose immediately understandable. However, it doesn't differentiate from sibling tools like 'xcode_create_project' or 'xcode_create_directory', which would require mentioning it's specifically for Swift source files rather than projects or directories.

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?

The description provides no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing an Xcode project context), exclusions, or comparisons with siblings like 'xcode_modify_plist' or 'xcode_read_file', leaving the agent to infer usage context.

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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