Server has 13 tools with complete schemas and descriptions. Naming follows verb_noun convention (text_to_speech, get_voices, create_agent). Descriptions are present and include cost warnings for API-calling tools. However, parameter descriptions lack detail on constraints (ranges, enums, formats). Output schemas are not documented. Error handling is minimal, no recovery guidance or actionable error messages. Tool composition is reasonable but some tools combine multiple concerns (e.g., start_conversation accepts both audio_file_path and implicit text). Missing idempotency guidance for retry-safe operations.

• Document output schemas for all tools. For get_voices, specify: returns array of {voice_id: string, name: string, category: string, ...}. For create_agent, specify: returns {agent_id: string, name: string, created_at: ISO8601, ...}.
• Add min/max bounds to numeric parameters in descriptions. E.g., 'stability (float, 0.0 - 1.0): Controls voice stability. Default 0.5.' for text_to_speech and create_agent parameters.
• Convert output_format to a formal enum constraint instead of listing values in description text. This enables LLM validation and prevents hallucinated formats.
• Add recovery guidance to error messages. When voice_name lookup fails, return: 'Voice "xyz" not found. Call get_voices() to see available voices: [list top 5].'
• Implement confirmation pattern for delete_agent. Add optional dry_run parameter or require explicit confirmation_token. Prevent accidental deletion of agents.