Strong domain-specific tool design with clear naming (search, list_families, describe, validate, generate, parse) and comprehensive parameter descriptions. All 7 tools have explicit schemas with type definitions and detailed descriptions (avg 180+ chars). Error handling guidance is present (e.g., 'On failure the error value lists every missing or invalid field at once'). However, output schemas are not formally documented in the tool definitions themselves, responses are described narratively rather than as structured JSON Schema. Parameter descriptions are excellent (field names, formats, aliases documented), but some tools lack explicit enum constraints where applicable (e.g., message_type could enumerate valid families). No security-sensitive parameters exposed. Tool composition is clean: each tool has one responsibility, and chaining is supported via returned identifiers.

• Add JSON Schema definitions for all tool outputs. Document the structure of 'results' in search, 'families' in list_families, 'xml' and 'error' in generate/parse responses.
• Convert message_type parameter to accept an enum of valid ISO 20022 message types, or add a discover_message_types tool that returns the full list with descriptions.
• Add limit and offset parameters to list_families and list_servers with documented defaults (e.g., limit=50) and return a total_count field for pagination.
• Define a structured error response schema (e.g., {error_code, error_message, invalid_fields: [{field, reason}], recovery_hint}) and document it in tool descriptions.
• Move example field names from descriptions into a separate 'examples' section or into the schema itself; keep descriptions focused on semantics and constraints.

Inferred effective spec: 2026-07-28+.

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