# MCP tool reference

1 callable tools.

Use tools/call at https://mcp.schedulerzero.com/mcp with the exact tool name and arguments below. The /tools/ paths in this view are documentation identifiers, not HTTP endpoints. Request execution is disabled for this reference.

Inputs are shown for personal API keys (bound) and for OAuth/delegated agents. Output schemas describe MCP structuredContent: native objects pass through; arrays, scalars and null use a data wrapper. Text content retains the native JSON result.

[Connect a client](/mcp/connect) · [Authentication and authorization](/authentication) · [Generated auth guide](/auth.md) · [Download tool catalog](/mcp-catalog.json) · [Agent documentation](/llms.txt)

## manage_dialer_seats

Grant or revoke a member's dialer seat, and set where the caller's own inbound dialer calls forward.

Use to give a new rep the ability to dial, to take a seat back from someone who has left the team, or to point inbound calls at the right handset.

Seats are billable: granting one consumes a purchased seat and granting past the purchased count is refused. Revoking a seat does not release the rep's numbers or turn off their forwarding.

Obtain the user's explicit authorization before invoking a write or destructive action. This is a client interaction requirement, not a server-issued approval token.

Scopes: dialer:assign_seats, dialer:manage_numbers_self

Risk: costly; confirmation: explicit; idempotency: supported.

### Input schema (personal API key)

```json
{
  "type": "object",
  "properties": {
    "workspaceId": {
      "type": "string",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
      "format": "uuid"
    },
    "action": {
      "anyOf": [
        {
          "type": "object",
          "properties": {
            "kind": {
              "type": "string",
              "enum": [
                "assign"
              ]
            },
            "seat": {
              "type": "object",
              "properties": {
                "userId": {
                  "type": "string",
                  "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
                  "format": "uuid"
                },
                "enabled": {
                  "type": "boolean"
                }
              },
              "required": [
                "userId",
                "enabled"
              ],
              "patternProperties": {
                "^(?!(?:userId|enabled)$)[\\s\\S]*$": false
              },
              "additionalProperties": true,
              "propertyNames": {
                "type": "string",
                "enum": [
                  "userId",
                  "enabled"
                ]
              }
            }
          },
          "required": [
            "kind",
            "seat"
          ],
          "patternProperties": {
            "^(?!(?:kind|seat)$)[\\s\\S]*$": false
          },
          "additionalProperties": true,
          "propertyNames": {
            "type": "string",
            "enum": [
              "kind",
              "seat"
            ]
          }
        },
        {
          "type": "object",
          "properties": {
            "kind": {
              "type": "string",
              "enum": [
                "set_forwarding"
              ]
            },
            "forwarding": {
              "type": "object",
              "properties": {
                "forwardE164": {
                  "anyOf": [
                    {
                      "$ref": "#/$defs/E164PhoneNumber"
                    },
                    {
                      "type": "null"
                    }
                  ]
                },
                "enabled": {
                  "type": "boolean"
                }
              },
              "required": [
                "forwardE164",
                "enabled"
              ],
              "patternProperties": {
                "^(?!(?:forwardE164|enabled)$)[\\s\\S]*$": false
              },
              "additionalProperties": true,
              "propertyNames": {
                "type": "string",
                "enum": [
                  "forwardE164",
                  "enabled"
                ]
              }
            }
          },
          "required": [
            "kind",
            "forwarding"
          ],
          "patternProperties": {
            "^(?!(?:kind|forwarding)$)[\\s\\S]*$": false
          },
          "additionalProperties": true,
          "propertyNames": {
            "type": "string",
            "enum": [
              "kind",
              "forwarding"
            ]
          }
        }
      ]
    }
  },
  "required": [
    "workspaceId",
    "action"
  ],
  "patternProperties": {
    "^(?!(?:workspaceId|action)$)[\\s\\S]*$": false
  },
  "additionalProperties": true,
  "propertyNames": {
    "type": "string",
    "enum": [
      "workspaceId",
      "action"
    ]
  },
  "$defs": {
    "E164PhoneNumber": {
      "type": "string",
      "pattern": "^\\+[1-9]\\d{1,14}$"
    }
  }
}
```

### Input schema (OAuth / delegated agent)

```json
{
  "type": "object",
  "properties": {
    "workspaceId": {
      "type": "string",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
      "format": "uuid"
    },
    "action": {
      "anyOf": [
        {
          "type": "object",
          "properties": {
            "kind": {
              "type": "string",
              "enum": [
                "assign"
              ]
            },
            "seat": {
              "type": "object",
              "properties": {
                "userId": {
                  "type": "string",
                  "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
                  "format": "uuid"
                },
                "enabled": {
                  "type": "boolean"
                }
              },
              "required": [
                "userId",
                "enabled"
              ],
              "patternProperties": {
                "^(?!(?:userId|enabled)$)[\\s\\S]*$": false
              },
              "additionalProperties": true,
              "propertyNames": {
                "type": "string",
                "enum": [
                  "userId",
                  "enabled"
                ]
              }
            }
          },
          "required": [
            "kind",
            "seat"
          ],
          "patternProperties": {
            "^(?!(?:kind|seat)$)[\\s\\S]*$": false
          },
          "additionalProperties": true,
          "propertyNames": {
            "type": "string",
            "enum": [
              "kind",
              "seat"
            ]
          }
        },
        {
          "type": "object",
          "properties": {
            "kind": {
              "type": "string",
              "enum": [
                "set_forwarding"
              ]
            },
            "forwarding": {
              "type": "object",
              "properties": {
                "forwardE164": {
                  "anyOf": [
                    {
                      "$ref": "#/$defs/E164PhoneNumber"
                    },
                    {
                      "type": "null"
                    }
                  ]
                },
                "enabled": {
                  "type": "boolean"
                }
              },
              "required": [
                "forwardE164",
                "enabled"
              ],
              "patternProperties": {
                "^(?!(?:forwardE164|enabled)$)[\\s\\S]*$": false
              },
              "additionalProperties": true,
              "propertyNames": {
                "type": "string",
                "enum": [
                  "forwardE164",
                  "enabled"
                ]
              }
            }
          },
          "required": [
            "kind",
            "forwarding"
          ],
          "patternProperties": {
            "^(?!(?:kind|forwarding)$)[\\s\\S]*$": false
          },
          "additionalProperties": true,
          "propertyNames": {
            "type": "string",
            "enum": [
              "kind",
              "forwarding"
            ]
          }
        }
      ]
    }
  },
  "required": [
    "workspaceId",
    "action"
  ],
  "patternProperties": {
    "^(?!(?:workspaceId|action)$)[\\s\\S]*$": false
  },
  "additionalProperties": true,
  "propertyNames": {
    "type": "string",
    "enum": [
      "workspaceId",
      "action"
    ]
  },
  "$defs": {
    "E164PhoneNumber": {
      "type": "string",
      "pattern": "^\\+[1-9]\\d{1,14}$"
    }
  }
}
```

### Output schema (structuredContent)

```json
{
  "$defs": {
    "DialerSeatId": {
      "type": "string",
      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
      "format": "uuid"
    },
    "UtcDateTimeEncoded": {
      "type": "string",
      "pattern": "^\\d{4}-\\d{2}-\\d{2}T\\d{2}:\\d{2}:\\d{2}\\.\\d{3}Z$"
    },
    "E164PhoneNumber": {
      "type": "string",
      "pattern": "^\\+[1-9]\\d{1,14}$"
    }
  },
  "type": "object",
  "anyOf": [
    {
      "allOf": [
        {
          "anyOf": [
            {
              "type": "object",
              "properties": {
                "id": {
                  "$ref": "#/$defs/DialerSeatId"
                },
                "userId": {
                  "type": "string",
                  "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
                  "format": "uuid"
                },
                "active": {
                  "type": "boolean"
                },
                "assignedAt": {
                  "$ref": "#/$defs/UtcDateTimeEncoded"
                },
                "assignedByUserId": {
                  "anyOf": [
                    {
                      "type": "string",
                      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
                      "format": "uuid"
                    },
                    {
                      "type": "null"
                    }
                  ]
                },
                "defaultInboundEnabled": {
                  "type": "boolean"
                },
                "defaultInboundForwardE164": {
                  "anyOf": [
                    {
                      "$ref": "#/$defs/E164PhoneNumber"
                    },
                    {
                      "type": "null"
                    }
                  ]
                }
              },
              "required": [
                "id",
                "userId",
                "active",
                "assignedAt",
                "assignedByUserId",
                "defaultInboundEnabled",
                "defaultInboundForwardE164"
              ],
              "patternProperties": {
                "^(?!(?:id|userId|active|assignedAt|assignedByUserId|defaultInboundEnabled|defaultInboundForwardE164)$)[\\s\\S]*$": false
              },
              "additionalProperties": true,
              "propertyNames": {
                "type": "string",
                "enum": [
                  "id",
                  "userId",
                  "active",
                  "assignedAt",
                  "assignedByUserId",
                  "defaultInboundEnabled",
                  "defaultInboundForwardE164"
                ]
              }
            },
            {
              "type": "object",
              "properties": {
                "enabled": {
                  "type": "boolean"
                },
                "forwardE164": {
                  "anyOf": [
                    {
                      "$ref": "#/$defs/E164PhoneNumber"
                    },
                    {
                      "type": "null"
                    }
                  ]
                },
                "appliedCount": {
                  "type": "integer",
                  "minimum": 0,
                  "maximum": 9007199254740991
                }
              },
              "required": [
                "enabled",
                "forwardE164",
                "appliedCount"
              ],
              "patternProperties": {
                "^(?!(?:enabled|forwardE164|appliedCount)$)[\\s\\S]*$": false
              },
              "additionalProperties": true,
              "propertyNames": {
                "type": "string",
                "enum": [
                  "enabled",
                  "forwardE164",
                  "appliedCount"
                ]
              }
            }
          ]
        },
        {
          "type": "object"
        }
      ]
    },
    {
      "type": "object",
      "properties": {
        "data": {
          "allOf": [
            {
              "anyOf": [
                {
                  "type": "object",
                  "properties": {
                    "id": {
                      "$ref": "#/$defs/DialerSeatId"
                    },
                    "userId": {
                      "type": "string",
                      "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
                      "format": "uuid"
                    },
                    "active": {
                      "type": "boolean"
                    },
                    "assignedAt": {
                      "$ref": "#/$defs/UtcDateTimeEncoded"
                    },
                    "assignedByUserId": {
                      "anyOf": [
                        {
                          "type": "string",
                          "pattern": "^([0-9a-fA-F]{8}-[0-9a-fA-F]{4}-[1-8][0-9a-fA-F]{3}-[89abAB][0-9a-fA-F]{3}-[0-9a-fA-F]{12}|00000000-0000-0000-0000-000000000000|[fF]{8}-[fF]{4}-[fF]{4}-[fF]{4}-[fF]{12})$",
                          "format": "uuid"
                        },
                        {
                          "type": "null"
                        }
                      ]
                    },
                    "defaultInboundEnabled": {
                      "type": "boolean"
                    },
                    "defaultInboundForwardE164": {
                      "anyOf": [
                        {
                          "$ref": "#/$defs/E164PhoneNumber"
                        },
                        {
                          "type": "null"
                        }
                      ]
                    }
                  },
                  "required": [
                    "id",
                    "userId",
                    "active",
                    "assignedAt",
                    "assignedByUserId",
                    "defaultInboundEnabled",
                    "defaultInboundForwardE164"
                  ],
                  "patternProperties": {
                    "^(?!(?:id|userId|active|assignedAt|assignedByUserId|defaultInboundEnabled|defaultInboundForwardE164)$)[\\s\\S]*$": false
                  },
                  "additionalProperties": true,
                  "propertyNames": {
                    "type": "string",
                    "enum": [
                      "id",
                      "userId",
                      "active",
                      "assignedAt",
                      "assignedByUserId",
                      "defaultInboundEnabled",
                      "defaultInboundForwardE164"
                    ]
                  }
                },
                {
                  "type": "object",
                  "properties": {
                    "enabled": {
                      "type": "boolean"
                    },
                    "forwardE164": {
                      "anyOf": [
                        {
                          "$ref": "#/$defs/E164PhoneNumber"
                        },
                        {
                          "type": "null"
                        }
                      ]
                    },
                    "appliedCount": {
                      "type": "integer",
                      "minimum": 0,
                      "maximum": 9007199254740991
                    }
                  },
                  "required": [
                    "enabled",
                    "forwardE164",
                    "appliedCount"
                  ],
                  "patternProperties": {
                    "^(?!(?:enabled|forwardE164|appliedCount)$)[\\s\\S]*$": false
                  },
                  "additionalProperties": true,
                  "propertyNames": {
                    "type": "string",
                    "enum": [
                      "enabled",
                      "forwardE164",
                      "appliedCount"
                    ]
                  }
                }
              ]
            },
            {
              "not": {
                "type": "object"
              }
            }
          ]
        }
      },
      "required": [
        "data"
      ],
      "additionalProperties": false
    }
  ]
}
```

### Underlying API operations

- `dialerSeats.assign`: `POST /v1/workspaces/:workspaceId/dialer/seats/assign`
- `dialerSeats.setInboundForwarding`: `POST /v1/workspaces/:workspaceId/dialer/seats/me/inbound-forwarding`