️ Claude Code Tools System

Overview: 54 Tools

Claude Code provides 54 tools organized into functional groups. Each tool implements a unified interface with execute, permission check, and system prompt description.

Tool Groups

File Operations (6 tools)

Execution (3 tools)

Agent (2 tools)

Web (2 tools)

MCP (3 tools)

Task Management (6 tools)

Mode Switch (4 tools)

KAIROS Exclusive (4 tools)

Other Tools (12+ tools)

• SkillTool - Execute custom skills
• LSPTool - Language Server Protocol operations
• BriefTool - KAIROS concise interaction
• TodoWriteTool - Task list management
• ToolSearchTool - Lazy loading hub for deferred tools
• ScheduleCronTool - Cron scheduling
• TeamCreateTool / TeamDeleteTool - Multi-agent teams

Tool Interface

All tools implement unified interface:

interface Tool {
  name: string;
  description: string;
  inputSchema: JSONSchema;
  execute(input, context): AsyncGenerator;
  isAllowed(input, context): PermissionDecision;
  prompt(): string;
  needsPermission(input): boolean;
}

Lazy Loading Mechanism

Model initially sees only ~15 core tools. Remaining tools loaded via ToolSearchTool:

• Keyword search: "notebook jupyter" → NotebookEditTool
• Exact selection: "select:MCPTool,LSPTool" → Direct load