Strong foundation with 11 well-named, verb-prefixed tools and comprehensive descriptions (avg 180 chars). All tools have detailed parameter documentation with types and constraints. Input schemas are visible and properly structured with enums (mode, kind) and optional flags. Output schemas documented in docstrings. However, error handling guidance is minimal, tools lack recovery hints for common failures (e.g., 'regulation not found, try search_regulation'). No tool annotations (readOnlyHint/destructiveHint) despite clear read/write distinction. Two write tools (update, sync_from_alio) lack confirmation/dry-run patterns. Parameter descriptions are excellent but could benefit from explicit format examples (e.g., article format '제11조' vs '11' vs '15의2').

• Add tool annotations: @mcp.tool(readOnlyHint=True) on all 9 read-only tools; @mcp.tool(destructiveHint=True) on update and sync_from_alio to signal operation safety.
• Implement error recovery guidance: catch common failures (regulation not found, article not found, invalid format) and return 'Try search_regulation() with a partial name' or 'Valid article formats: 제11조, 11, 15의2'.
• Add dry-run support to write tools: update(dry_run=True) and sync_from_alio(dry_run=True) to preview changes before committing. Return summary of what would change.
• Formalize output schemas in tool registration using JSON Schema (not just docstrings). Define return type as list[dict] with explicit field definitions (source, article, snippet, score, etc.).
• Constrain article parameter format: add enum or regex pattern to get_article and find_references. Document: 'article format: 제N조, N, or N의M (e.g., 제11조, 11, 15의2)'.