Strong tool naming (verb_noun pattern throughout) and comprehensive parameter schemas with type definitions. Descriptions are detailed and actionable (avg 150+ chars). All 12 tools have explicit input schemas with properties and descriptions. However, output schemas are not documented, LLMs cannot predict response structure. Error handling guidance is absent. Some parameter descriptions could be more prescriptive about constraints (e.g., transaction_id format, category_path syntax). Dry-run support on write operations is excellent (categorize_transaction, batch_categorize_transactions, create_rule). Missing: per-tool output schema documentation, error recovery guidance, and explicit parameter constraints (min/max, regex patterns).

• Document output schemas for all 12 tools. Include field names, types, and descriptions. Example: get_accounts should return {accounts: [{id, name, type, balance, currency}], total_count}.
• Add error recovery guidance to write operations. E.g., categorize_transaction: 'If transaction_id not found, call get_transactions() to retrieve valid IDs. If category_path invalid, call search_categories() first.'
• Formalize parameter constraints in schemas. Add 'pattern' for transaction_id (e.g., '^(tx-)?[a-zA-Z0-9]+$'), 'maxLength' for payee_contains (200), category (300). Add 'minimum' and 'maximum' for limit and year.
• Add pagination support: include 'offset' or 'cursor' parameter, and return 'total_count' and 'has_more' in responses. Cap default limit at 20-50 items to prevent context window exhaustion.
• Enhance dry-run to support confirmation workflow: add 'require_confirmation' parameter. If true, return a confirmation token that must be passed in a follow-up call to execute. Prevents accidental destructive operations.