Strong foundation with 9 well-named tools following verb_noun convention (vault_search, vault_get_note, vault_write_note, etc.). All tools have descriptions (avg ~150 chars, within 10-1024 baseline). Input schemas are present and use Zod with type definitions. However, parameter descriptions are sparse or missing in several tools (vault_list has empty input schema; vault_backlinks lacks detail on return format). Output schemas are not documented in tool definitions, LLMs cannot predict response structure. Error handling exists but lacks recovery guidance. Tool composition is sound (single responsibility, proper chaining via path/domain fields). Security considerations present (read-only vs write risk annotations), but no explicit permission gates or audit logging visible.

• Document output schemas for all tools in tool definitions. Include field names, types, and pagination info. Example: 'Returns {chunks: [{path, headingPath, score, text}], total: number}'.
• Add parameter descriptions to vault_list input schema. Document what metadata filters are available (type, tags, status, folder) and their valid values.
• Enhance error messages with recovery guidance. E.g., 'Note not found at path/to/note.md. Try vault_search() to find similar notes, or vault_list() to browse available notes.'
• Implement confirmation pattern for vault_delete: add a 'dry_run' parameter or require explicit 'confirm: true' when backlinks exist.
• Add audit logging: log caller identity, tool name, parameters (sanitized), timestamp, and result to stderr or structured log. Include scope declarations (read:vault, write:vault, delete:vault).