Built-in MCP Server Tools
CTX provides several tools that can be enabled or disabled through environment variables. Below is a description of each tool, how to configure them, and how to use advanced features like JSON Schema, conditional arguments, and template processing.
Environment Variables Configuration
The tools system can be configured using environment variables to enable or disable specific features:
General Configuration
| Variable | Description | Default |
|---|---|---|
MCP_CUSTOM_TOOLS_ENABLE | Enable/disable custom tools | true |
MCP_TOOL_MAX_RUNTIME | Maximum runtime for a command in seconds | 30 |
MCP_TOOL_COMMAND_EXECUTION | Enable/disable command execution | true |
MCP_FILE_OPERATIONS | Master switch for all file operation tools | true |
MCP_FILE_WRITE | Enable/disable file write operations | true |
MCP_FILE_APPLY_PATCH | Enable/disable applying patches to files | false |
MCP_FILE_DIRECTORIES_LIST | Enable/disable directory listing | true |
MCP_DOCS_TOOLS_ENABLED | Enable/disable Context7 documentation tools | true |
Available Tool Categories
File Operations (MCP_FILE_OPERATIONS=true)
Master switch for all file operation tools. When set to false, all below file tools are disabled regardless of their individual settings.
| Tool Key | Description | Environment Variable | Default |
|---|---|---|---|
file-info | Get information about a file (size, type, modification date) | Always available when file operations are enabled | - |
file-read | Read content from a file | Always available when file operations are enabled | - |
file-rename | Rename a file | Always available when file operations are enabled | - |
file-move | Move a file from one location to another | Always available when file operations are enabled | - |
directory-list | List files and directories in a specified path | MCP_FILE_DIRECTORIES_LIST | true |
file-write | Create new files or modify existing ones | MCP_FILE_WRITE | true |
file-apply-patch | Apply git-style patches to files | MCP_FILE_APPLY_PATCH | false (experimental) |
Context Operations (MCP_CONTEXT_OPERATIONS=true)
Tools for working with context information.
| Tool Key | Description | Environment Variable | Default |
|---|---|---|---|
context-request | Request context information using filters and modifiers | Always available when context operations are enabled | - |
context-get | Get a specific context document | Always available when context operations are enabled | - |
context | List all available contexts | Always available when context operations are enabled | - |
Prompt Operations (MCP_PROMPT_OPERATIONS=false)
Experimental tools for working with prompts.
| Tool Key | Description | Environment Variable | Default |
|---|---|---|---|
prompt-get | Retrieve a specific prompt | MCP_PROMPT_OPERATIONS | false (experimental) |
prompts-list | List all available prompts | MCP_PROMPT_OPERATIONS | false (experimental) |
Docs Tools (MCP_DOCS_TOOLS_ENABLED)
Search for documentation libraries available on the Context7 service.
Parameters
| Parameter | Type | Required | Default | Description |
|---|---|---|---|---|
query | string | Yes | - | Search query to find documentation libraries |
limit | integer | No | 5 | Maximum number of results to return |
Always Available Tools
These tools are always available regardless of environment configuration:
| Tool Key | Description |
|---|---|
project-structure | Get information about the project structure |
filesystem-operations | Perform basic filesystem queries |
list-resources | List all available resources |
json-schema | Get JSON schema for various entities |
document-content | Get document content by ID |
list-tools | List all available tools (what you're using now) |