claude-baton has well-structured schemas and clear descriptions for all 4 tools. Tool names follow verb_noun convention (save_, get_, list_, daily_). However, several parameters lack descriptions (e.g., 'limit' in list_checkpoints has a description but 'id' in get_checkpoint is sparse), and output schemas are not documented. Error handling is minimal, no recovery guidance or actionable error messages visible in the code. The server targets a narrow domain (session checkpointing) with appropriate tool composition, but lacks the depth of parameter validation and error classification expected for production use.

• Document output schemas for all tools. E.g., get_checkpoint should return {id: string, created_at: ISO8601, what_was_built: string, current_state: string, next_steps: string, ...}. Include this in tool descriptions or as a separate schema field.
• Add recovery guidance to error messages. Replace 'Invalid project path' with 'Invalid project path. Ensure the path exists and contains a .claude-baton database, or omit project to use current working directory.'
• Add min/max constraints to numeric parameters. E.g., limit: 'Max checkpoints to return (default 10, range 1 - 100).'
• Enhance parameter descriptions with format hints and discovery references. E.g., id: 'Checkpoint ID (UUID format). Call list_checkpoints to discover available IDs.'
• Implement per-item error reporting for batch operations. If save_checkpoint processes multiple uncommitted_files, return success/failure per file rather than all-or-nothing.