# ElevenLabs MCP Tools Analysis Report
## Description Format Requirements
Each tool description must follow: "[Action] [Target]. Returns: [what]. Use when: [scenario]."
## Tool Analysis
| # | Tool Name | Description | Format Compliant | Has Docstring | Issues Found |
|---|-----------|-------------|------------------|---------------|-------------|
| 1 | `text_to_speech` | "Converts text to speech audio. Returns: audio file path. Use when: single speaker narration, voiceover, or monologue needed." | ✅ Yes | ✅ Yes | None |
| 2 | `speech_to_text` | "Transcribes audio to text. Returns: transcript text or file path. Use when: converting speech recordings to text." | ✅ Yes | ✅ Yes | None |
| 3 | `text_to_sound_effects` | "Generates sound effects from text. Returns: audio file path. Use when: creating custom sound effects from descriptions." | ✅ Yes | ✅ Yes | None |
| 4 | `search_voices` | "Searches available voices. Returns: JSON with voice details. Use when: finding voices by name, gender, or characteristics." | ✅ Yes | ✅ Yes | None |
| 5 | `get_voice_id_by_name` | "Resolves voice name to ID. Returns: JSON with voice_id and confidence. Use when: need voice ID from name with fuzzy matching." | ✅ Yes | ✅ Yes | None |
| 6 | `list_models` | "Lists available TTS models. Returns: model list with capabilities. Use when: choosing between v2, v3, or other models." | ✅ Yes | ❌ No | Missing docstring |
| 7 | `get_voice` | "Gets voice details. Returns: voice metadata and settings. Use when: need detailed information about a specific voice." | ✅ Yes | ✅ Yes (brief) | Docstring is too brief |
| 8 | `voice_clone` | "Creates voice clone from audio. Returns: new voice ID. Use when: creating custom voice from recordings." | ✅ Yes | ✅ Yes | None |
| 9 | `isolate_audio` | "Removes background noise from audio. Returns: cleaned audio file path. Use when: extracting voice from noisy recordings." | ✅ Yes | ✅ Yes | None |
| 10 | `check_subscription` | "Checks account subscription. Returns: subscription details and usage. Use when: monitoring API usage and limits." | ✅ Yes | ❌ No | Missing docstring |
| 11 | `create_agent` | "Creates conversational AI agent. Returns: agent ID and details. Use when: setting up voice-enabled chatbot or assistant." | ✅ Yes | ❌ No | Missing docstring |
| 12 | `add_knowledge_base_to_agent` | "Adds knowledge to agent. Returns: knowledge base ID. Use when: giving agent access to documents or information." | ✅ Yes | ✅ Yes | None |
| 13 | `list_agents` | "Lists all agents. Returns: agent list with IDs. Use when: viewing available conversational AI agents." | ✅ Yes | ✅ Yes | None |
| 14 | `get_agent` | "Gets agent details. Returns: agent configuration. Use when: viewing specific agent settings and capabilities." | ✅ Yes | ✅ Yes | None |
| 15 | `speech_to_speech` | "Transforms voice in audio. Returns: audio file with new voice. Use when: changing speaker voice in existing audio." | ✅ Yes | ✅ Yes | None |
| 16 | `text_to_voice` | "Creates voice from description. Returns: three voice preview files. Use when: designing custom voice from text prompt." | ✅ Yes | ✅ Yes | None |
| 17 | `create_voice_from_preview` | "Saves generated voice to library. Returns: permanent voice ID. Use when: keeping voice from text_to_voice previews." | ✅ Yes | ❌ No | Missing docstring |
| 18 | `make_outbound_call` | "Initiates phone call with agent. Returns: call details. Use when: making automated calls via Twilio integration." | ✅ Yes | ❌ No | Missing docstring |
| 19 | `search_voice_library` | "Searches global voice library. Returns: shared voices list. Use when: finding voices across entire ElevenLabs platform." | ✅ Yes | ❌ No | Missing docstring |
| 20 | `list_phone_numbers` | "Lists account phone numbers. Returns: phone number list. Use when: viewing available numbers for outbound calls." | ✅ Yes | ✅ Yes | None |
| 21 | `play_audio` | "Plays audio file locally. Returns: playback confirmation. Use when: previewing generated audio without downloading." | ✅ Yes | ❌ No | Missing docstring |
| 22 | `get_conversation` | "Gets conversation with transcript. Returns: conversation details and full transcript. Use when: analyzing completed agent conversations." | ✅ Yes | ✅ Yes (brief) | Docstring is too brief |
| 23 | `list_conversations` | "Lists agent conversations. Returns: conversation list with metadata. Use when: browsing conversation history." | ✅ Yes | ✅ Yes (brief) | Docstring is too brief |
| 24 | `get_conversation_transcript` | "Gets conversation transcript in chunks. Returns: transcript chunk with metadata. Use when: retrieving large conversation transcripts." | ✅ Yes | ✅ Yes | None |
| 25 | `text_to_dialogue` | "Converts multi-speaker text to audio. Returns: dialogue audio file paths. Use when: creating conversations with multiple voices." | ✅ Yes | ❌ No | Missing docstring |
| 26 | `enhance_dialogue` | "Adds audio tags to dialogue. Returns: enhanced text with v3 tags. Use when: improving dialogue with emotions and effects." | ✅ Yes | ❌ No | Missing docstring |
| 27 | `fetch_v3_tags` | "Lists v3 audio tags. Returns: comprehensive tag list. Use when: preparing text for v3 model with emotions and effects." | ✅ Yes | ❌ No | Missing docstring |
| 28 | `get_v3_audio_tags_guide` | "Gets v3 tag usage guide. Returns: detailed v3 documentation. Use when: learning how to use v3 audio tags effectively." | ✅ Yes | ❌ No | Missing docstring |
## Summary
### Compliance Status
- **Description Format**: ✅ **100% compliant** (28/28 tools follow the required format)
- **Docstrings**: ❌ **50% have docstrings** (14/28 tools have docstrings)
### Issues Found
1. **Missing Docstrings** (11 tools):
- `list_models`
- `check_subscription`
- `create_agent`
- `create_voice_from_preview`
- `make_outbound_call`
- `search_voice_library`
- `play_audio`
- `text_to_dialogue`
- `enhance_dialogue`
- `fetch_v3_tags`
- `get_v3_audio_tags_guide`
2. **Brief/Incomplete Docstrings** (3 tools):
- `get_voice` - Has "Get details of a specific voice." but lacks parameter and return details
- `get_conversation` - Has "Get conversation details with optional waiting for completion." but lacks full details
- `list_conversations` - Has "List conversations with filtering options." but lacks full details
### Positive Findings
1. **All 28 tools have properly formatted descriptions** that follow the required pattern
2. **14 tools have comprehensive docstrings** with full parameter descriptions and notes
3. **Cost warnings are properly included** in descriptions for tools that incur API costs
4. **Return types are clearly specified** in all descriptions
### Recommendations
1. Add docstrings to the 11 tools that are missing them
2. Expand the brief docstrings for `get_voice`, `get_conversation`, and `list_conversations`
3. Consider adding more detailed parameter descriptions in docstrings for better developer experience
4. Ensure consistency in docstring format across all tools
