Four tools with clear, domain-specific names (list_*, get_*, generate_*, validate_*) and solid descriptions (100 - 200 chars). All tools have input schemas with typed parameters and descriptions. Output schemas are not explicitly documented in the visible code, which is a gap. Error handling is mentioned (XSD validation returns errors) but recovery guidance is minimal. Tool composition is good, each has one responsibility and outputs chain naturally (list_message_types → get_required_fields → generate_message → validate_xml). No security issues detected (all READ_ONLY, no secrets in params). Naming follows verb_noun convention well.

• Document output schemas for all four tools. Specify the structure of list_message_types (array of {type, name}?), get_required_fields (array of field objects?), generate_message (XML string + metadata?), and validate_xml (boolean + error array?).
• Replace the 'record' parameter in generate_message with a formal JSON Schema. Either inline the schema or reference it: 'See get_required_fields for the required structure.' This eliminates guessing.
• Add error recovery guidance: 'If validation fails, call get_required_fields to confirm the required structure, then retry with corrected input.' Include example error messages and how to interpret them.
• Add a limit parameter to list_message_types (default 50, max 100) and document pagination if the list grows. Return a total_count field so agents know if more results exist.
• Remove example message type IDs from parameter descriptions. Instead, add a note: 'Call list_message_types first to see available types.' This guides discovery without hardcoding examples.

Inferred effective spec: 2026-07-28+.

• Relies on Stateful initialize / Mcp-Session-Id (removed; protocol is stateless) - make each request self-contained