Server has 19 tools with basic naming and descriptions, but significant gaps in schema completeness and parameter documentation. Tool names follow verb_noun convention (get_, list_, create_), which is good. However, most tools lack visible input schemas in the provided code, only 2 tools (get_account_balances, get_account_transactions) show explicit schema definitions. Descriptions are present but generic (10-50 chars for many tools), falling below the 50-200 char LLM-optimized baseline. No output schemas documented. Error handling and recovery guidance absent. Parameter descriptions missing for most tools (e.g., list_invoices, get_invoice_details show no schema). This is typical of community servers, functional but not production-grade.

• Add explicit JSON Schema input definitions for all 17 tools lacking them. Minimum: type, description, and enum constraints for categorical params (e.g., account_type: enum [Bank, CreditCard, All]).
• Expand tool descriptions to 80-150 characters. Include: WHAT it does, WHEN to use it (vs similar tools), and WHAT it returns. Example: 'Get all unpaid invoices with aging details (days overdue). Use this to identify collection priorities. Returns invoice ID, customer, amount, and days overdue.'
• Document output schemas for all tools. Specify field names, types, and whether pagination is supported. Example for list_invoices: 'Returns {invoices: [{id, customer_name, amount, status, date}], total_count, has_more}'.
• Add parameter descriptions for all inputs. For list_invoices, document: status (enum: draft|sent|viewed|paid|overdue), date_from/date_to (ISO 8601), limit (1-100, default 25).
• Implement dry-run or confirmation pattern for create_* tools. Add optional 'confirm' parameter or return a confirmation token requiring explicit approval before executing writes.

Inferred effective spec: <=2025-11-25.

• Relies on Logging (deprecated) - log to stderr or use OpenTelemetry