> ## Documentation Index
> Fetch the complete documentation index at: https://docs.sia.vision/llms.txt
> Use this file to discover all available pages before exploring further.

# Choose a provisional Character voice

> character_voice_autoselect: permissions and generated input/output contracts.

`character_voice_autoselect` · Gateway release **0.8.3**

Choose and save a suitable existing workspace voice from a brief preference, without asking the user for a voice ID or claiming anyone listened to a preview. Saves the actual Character default and synchronizes its Bible; the choice is provisional and can be changed later in Studio. Preserves an already-saved default. No cloning, importing, speech generation or billing. Retry only the same operationId; uncertain assignment is reconciled using its MCP-linked audit revision, never silently repeated. Use this for delegated automatic creation; character\_voice\_assign retains its manual preview-review requirement.

Required scopes: `account:read`, `studio:write`. Changes saved state or requests work; review the operation’s effects.

Availability depends on runtime configuration and the permissions granted to this connection. Use live MCP discovery as the authority.

## Input

```json theme={null}
{
  "type": "object",
  "additionalProperties": false,
  "properties": {
    "storyworldId": {
      "type": "string",
      "pattern": "^[a-fA-F0-9]{24}$",
      "description": "ID of an accessible saved Storyworld returned by discovery. Keep this destination fixed for the operation."
    },
    "characterId": {
      "type": "string",
      "pattern": "^[a-fA-F0-9]{24}$",
      "description": "ID of the exact saved Character to reuse; do not create a new identity for an outfit or accessory."
    },
    "operationId": {
      "type": "string",
      "pattern": "^[a-zA-Z0-9-]{16,64}$",
      "description": "Persist a client-generated UUID before this mutation. Repeat identical inputs and this same ID after interruption; a new ID is a new request."
    },
    "preference": {
      "type": "string",
      "maxLength": 1000
    }
  },
  "required": [
    "storyworldId",
    "characterId",
    "operationId"
  ]
}
```

## Declared output

This is the declared success schema. Error results and binary media blocks are separate MCP protocol results.

```json theme={null}
{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "type": "object",
  "properties": {
    "schemaVersion": {
      "type": "string",
      "const": "1"
    },
    "assigned": {
      "type": "boolean"
    },
    "provisional": {
      "type": "boolean"
    },
    "previewReviewed": {
      "type": "boolean",
      "const": false
    },
    "status": {
      "type": "string"
    }
  },
  "required": [
    "schemaVersion",
    "assigned",
    "provisional",
    "previewReviewed",
    "status"
  ],
  "additionalProperties": {}
}
```

[All tools](https://docs.sia.vision/mcp-reference.md) · [Permissions](https://docs.sia.vision/authentication.md) · [Media and recovery](https://docs.sia.vision/media-and-recovery.md)


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