NoteMesh demonstrates solid definition quality across 38 tools with consistent naming patterns, descriptions present on all tools, and explicit input schemas. Naming follows verb_noun convention (read_note_range, create_note, list_notes, etc.). All tools have descriptions ranging 20-150 characters. Input schemas are explicitly defined with types and field descriptions. However, several definition-quality gaps prevent a higher score: (1) output schemas are not documented in visible source code, responses described in user-facing UI but not in formal schema definitions; (2) error handling is minimal, no evidence of recovery guidance or error categorization; (3) parameter descriptions lack detail on constraints (e.g., list_notes 'limit' lacks min/max specification even though it mentions max 500); (4) some tools have overlapping semantics that could be better distinguished (e.g., read_note_range, read_properties, outline all extract note structure, no clear guidance on which to use when). The server does well on naming clarity and basic description presence, matching the baseline of 90% of A+ tools having non-empty descriptions, but falls short on output schema documentation and error handling sophistication expected at 70+.

• Add formal output schemas to all tool definitions. Document return fields, types, and structure. For list_notes, include per-item fields (name, path, modified, size, etc.) and pagination metadata (total, next_offset).
• Expand parameter descriptions with constraints. For 'limit' params, explicitly state 'limit: 1 - 500 (default 100)' and describe behavior at boundaries. For 'path', specify 'Vault-relative path in POSIX format (e.g., Folder/Note.md), case-sensitive, .md extension required for notes'.
• Implement structured error responses for critical tools (create_note, update_note, delete_note, edit_note). Return error objects with code, message, and recovery suggestions: { error: { code: 'NOTE_NOT_FOUND', message: 'Note at path X not found', suggestions: ['Try search_vault() to find the note', 'Call unique_note() to find an available path'] } }
• Add preview/confirmation patterns to destructive tools. Before delete_note or update_note destructively replaces content, offer a dry-run or ask for explicit confirmation with affected content size/scope.
• Clarify tool purpose hierarchy. Document: 'Use read_note_range() for raw content, outline() for structure, read_properties() for frontmatter. Use edit_note() for targeted replacements; use update_note() to replace entire content.'
• Add batch variants for commonly chained operations. Introduce batch_set_properties(path, properties) to set multiple frontmatter fields in one call instead of N sequential set_property calls.
• Document idempotency guarantees. Specify which tools are safe to retry (most reads, idempotent writes like set_property) and which have side effects (create_note, append_to_note). This guides agent retry logic.