Four well-named, read-only tools with clear descriptions and solid input schemas. Naming follows verb_noun convention (get_index, search_notes, read_note, list_recent). Descriptions are detailed and explain WHEN to use each tool and what it returns. Input schemas use Zod with proper type constraints (min/max for numbers, string length). However, output schemas are not formally documented, responses are free-text wrapped in {content:[{type:'text',text:...}]} with no structured field definitions. Error handling is present but generic (no recovery guidance or error classification). No tool annotations (readOnlyHint, idempotentHint). The hard page budget and path sandboxing are enforced in code, which is good security practice, but not exposed in tool metadata.

• Document output schemas for all tools. Define structured responses: get_index returns {pages: [{path, title}]}, search_notes returns {matches: [{file, snippets: [{line, text}]}], total_matches}, read_note returns {path, content, truncated, bytes_read}, list_recent returns {files: [{path, modified_date}], count}.
• Add tool annotations: mark all four tools with readOnlyHint=true and idempotentHint=true to signal safety and retry behavior to LLMs.
• Enhance error messages with recovery guidance. E.g., 'No index.md found. Try search_notes(query) to locate pages by keyword.' or 'Path escapes vault. Vault root: /path/to/vault. Requested: /etc/passwd. Rejected.'
• Refactor search_notes output to return structured JSON: {matches: [{file: 'path/to/file.md', snippets: [{line_number: 42, text: 'matching line'}]}], total_matches: 5, budget_remaining: 5}. Avoid free-text parsing.
• For read_note truncation, return {path, content, truncated: true, bytes_read: 50000, total_bytes: 75000} so LLMs know how much was dropped and can decide whether to request a different file or accept the partial content.