Instructions given to the model for each of the 36+ built-in tools
Executes a given bash command and returns its output. The working directory persists between commands, but shell state does not. The shell environment is initialized from the user's profile (bash or ...
Reads a file from the local filesystem. You can access any file directly by using this tool. Assume this tool is able to read all files on the machine. If the User provides a path to a file assume tha...
Performs exact string replacements in files. Usage: - You must use your `Read` tool at least once in the conversation before editing. This tool will error if you attempt an edit without reading the f...
Writes a file to the local filesystem. Usage: - This tool will overwrite the existing file if there is one at the provided path. - If this is an existing file, you MUST use the Read tool first to rea...
- Fast file pattern matching tool that works with any codebase size - Supports glob patterns like "**/*.js" or "src/**/*.ts" - Returns matching file paths sorted by modification time - Use this tool w...
A powerful search tool built on ripgrep Usage: - ALWAYS use Grep for search tasks. NEVER invoke `grep` or `rg` as a Bash command. The Grep tool has been optimized for correct permissions and access. ...
Completely replaces the contents of a specific cell in a Jupyter notebook (.ipynb file) with new source. Jupyter notebooks are interactive documents that combine code, text, and visualizations, common...
- Allows Claude to search the web and use the results to inform responses - Provides up-to-date information for current events and recent data - Returns search result information formatted as search r...
- Fetches content from a specified URL and processes it using an AI model - Takes a URL and a prompt as input - Fetches the URL content, converts HTML to markdown - Processes the content with the prom...
Launch a new agent to handle complex, multi-step tasks autonomously. The Agent tool launches specialized agents (subprocesses) that autonomously handle complex tasks. Each agent type has specific cap...
Use this tool to create a structured task list for your current coding session. This helps you track progress, organize complex tasks, and demonstrate thoroughness to the user. It also helps the user ...
Use this tool to create and manage a structured task list for your current coding session. This helps you track progress, organize complex tasks, and demonstrate thoroughness to the user. It also help...
Use this tool proactively when you're about to start a non-trivial implementation task. Getting user sign-off on your approach before writing code prevents wasted effort and ensures alignment. This to...
Use this tool when you are in plan mode and have finished writing your plan to the plan file and are ready for user approval. ## How This Tool Works - You should have already written your plan to the...
[Dynamic — MCP tool prompts and descriptions are populated at runtime from connected MCP server tool definitions. The MCPTool.ts file declares empty PROMPT and DESCRIPTION constants that are overridde...
Asks the user multiple choice questions to gather information, clarify ambiguity, understand preferences, make decisions or offer them choices. Use this tool when you need to ask the user questions d...
Get or set Claude Code configuration settings. View or change Claude Code settings. Use when the user requests configuration changes, asks about current settings, or when adjusting a setting would be...
Execute a skill within the main conversation When users ask you to perform tasks, check if any of the available skills match. Skills provide specialized capabilities and domain knowledge. When users...
Send a message the user will read. Text outside this tool is visible in the detail view, but most won't open it — the answer lives here. `message` supports markdown. `attachments` takes file paths (a...
Wait for a specified duration. The user can interrupt the sleep at any time. Use this when the user tells you to sleep or rest, when you have nothing to do, or when you're waiting for something. You...
Call the claude.ai remote-trigger API. Use this instead of curl — the OAuth token is added automatically in-process and never exposed. Actions: - list: GET /v1/code/triggers - get: GET /v1/code/trigg...
List available resources from configured MCP servers. Each returned resource will include all standard MCP resource fields plus a 'server' field indicating which server the resource belongs to. Para...
Reads a specific resource from an MCP server, identified by server name and resource URI. Parameters: - server (required): The name of the MCP server from which to read the resource - uri (required):...
- Stops a running background task by its ID - Takes a task_id parameter identifying the task to stop - Returns a success or failure status - Use this tool when you need to terminate a long-running tas...
Use this tool ONLY when the user explicitly asks to work in a worktree. This tool creates an isolated git worktree and switches the current session into it. ## When to Use - The user explicitly says...
Exit a worktree session created by EnterWorktree and return the session to the original working directory. ## Scope This tool ONLY operates on worktrees created by EnterWorktree in this session. It ...
Interact with Language Server Protocol (LSP) servers to get code intelligence features. Supported operations: - goToDefinition: Find where a symbol is defined - findReferences: Find all references to...
Use this tool to retrieve a task by its ID from the task list. ## When to Use This Tool - When you need the full description and context before starting work on a task - To understand task dependenc...
## Agent swarms disabled (isAgentSwarmsEnabled() === false) Use this tool to list all tasks in the task list. ## When to Use This Tool - To see what tasks are available to work on (status: 'pending'...
Use this tool to update a task in the task list. ## When to Use This Tool **Mark tasks as resolved:** - When you have completed the work described in a task - When a task is no longer needed or has ...
# TeamDelete Remove team and task directories when the swarm work is complete. This operation: - Removes the team directory (`~/.claude/teams/{team-name}/`) - Removes the task directory (`~/.claude/...
Fetches full schema definitions for deferred tools so they can be called. ### Deferred tool location (delta / ant USER_TYPE) Deferred tools appear by name in <system-reminder> messages. ### Deferred...
## UDS_INBOX disabled # SendMessage Send a message to another agent. ```json {"to": "researcher", "summary": "assign task 1", "message": "start on task #1"} ``` | `to` | | |---|---| | `"researcher"...
## CronCreate — durable: true Schedule a prompt to be enqueued at a future time. Use for both recurring schedules and one-shot reminders. Uses standard 5-field cron in the user's local timezone: minu...
### durable: true Cancel a cron job previously scheduled with CronCreate. Removes it from .claude/scheduled_tasks.json (durable jobs) or the in-memory session store (session-only jobs). ### durable: ...
### durable: true List all cron jobs scheduled via CronCreate, both durable (.claude/scheduled_tasks.json) and session-only. ### durable: false List all cron jobs scheduled via CronCreate in this ses...
Executes a given PowerShell command with optional timeout. Working directory persists between commands; shell state (variables, functions) does not. IMPORTANT: This tool is for terminal operations vi...
# TeamCreate ## When to Use Use this tool proactively whenever: - The user explicitly asks to use a team, swarm, or group of agents - The user mentions wanting agents to work together, coordinate, o...