> ## Documentation Index
> Fetch the complete documentation index at: https://guide.omnia-voice.com/llms.txt
> Use this file to discover all available pages before exploring further.

# List system tools

> Built-in call-control tools. Attach them by name like any other tool —
no configuration required.

`hangUp` ends the call; without it an agent that has finished simply
waits. `playDtmfSounds` sends touch tones for navigating an IVR menu.




## OpenAPI

````yaml /openapi.yaml get /agent-tools/system
openapi: 3.0.0
info:
  title: Omnia Voice API
  description: >
    The Omnia Voice API allows you to programmatically manage voice agents,
    tools, phone numbers, and call logs.


    ## Authentication

    All API requests require an API key to be passed in the `X-API-Key` header.


    ## Rate Limiting

    API requests are rate limited to 1000 requests per hour per API key.
  version: 1.0.0
  contact:
    email: support@omnia-voice.com
servers:
  - url: https://api.omnia-voice.com/api/v1
    description: Production
  - url: https://dashboard.omnia-voice.com/api/v1
    description: Production (alias — same service)
security:
  - ApiKeyAuth: []
tags:
  - name: Agents
    description: Manage voice agents
  - name: Tools
    description: Manage agent tools and actions
  - name: Phone Numbers
    description: Manage phone number assignments
  - name: Calls
    description: Create and manage voice calls
  - name: Call Logs
    description: View call history and details
  - name: Pricing
    description: Get pricing information and calculate call costs
  - name: Configuration
    description: Get configuration options (voices, languages)
paths:
  /agent-tools/system:
    get:
      tags:
        - Tools
      summary: List system tools
      description: |
        Built-in call-control tools. Attach them by name like any other tool —
        no configuration required.

        `hangUp` ends the call; without it an agent that has finished simply
        waits. `playDtmfSounds` sends touch tones for navigating an IVR menu.
      operationId: listSystemTools
      responses:
        '200':
          description: Successful response
          content:
            application/json:
              schema:
                type: object
                properties:
                  data:
                    type: array
                    items:
                      type: object
                      properties:
                        id:
                          type: string
                        toolName:
                          type: string
                          example: hangUp
                        displayName:
                          type: string
                        description:
                          type: string
                          nullable: true
components:
  securitySchemes:
    ApiKeyAuth:
      type: apiKey
      in: header
      name: X-API-Key
      description: API key for authentication

````