The server has reasonable tool definitions with clear, action-verb names and documented parameters. All 6 tools have descriptions and input schemas with proper typing. However, output schemas are not documented (ToolDefinition.output_schema is optional and appears unused in tool registration). Parameter descriptions are minimal but present. Error handling guidance is absent. The tools follow a logical session-based pattern (open_cpacs → operations → close_cpacs), which aids composition. Schema completeness is moderate, parameters have types but lack constraints (enums, min/max bounds, format specs). This lands the server in the C-to-low-B range: functional but missing production-grade polish that A-tier tools demonstrate.

• Document output schemas for all tools. E.g., open_cpacs should declare it returns {session_id: string, metadata: {...}}. get_configuration_summary should specify the structure of the 'summary' object (component counts, bounding box fields, types). This enables LLMs to chain tools and extract required data.
• Add enum constraints for format parameters. E.g., export_component_mesh.format should be enum: ['stl', 'vtk', 'obj', ...]. export_configuration_cad.format should be enum: ['step', 'iges']. This prevents hallucinated values and is self-documenting.
• Enhance error handling with recovery guidance. E.g., open_cpacs: 'Raises ValueError if source is invalid XML or file not found, check that source_type matches source content.' get_component_metadata: 'Raises KeyError if component_uid does not exist in the session, call get_configuration_summary first to list valid UIDs.'
• Expand parameter descriptions to include format, constraints, and examples. E.g., session_id: 'Session identifier returned by open_cpacs; valid for the lifetime of the Python process or until close_cpacs is called.'
• Add a list_sessions or get_active_sessions tool to improve discoverability. Agents need to know which sessions exist and can be operated on.
• Document pagination or result limits if applicable. E.g., if export_component_mesh can produce very large meshes, state a size limit or how to request lower-resolution output.

Inferred effective spec: 2025-06-18+.

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