Cinema 4D MCP has basic tool structure but significant quality gaps. All 6 tools have descriptions and input schemas are partially visible, but parameter descriptions are minimal or missing entirely. Tool names follow verb_noun convention (get_, add_, list_, modify_, create_, apply_) which is good. However, schemas lack proper type constraints (enums, ranges), output schemas are undocumented, and error handling is generic. The server returns unstructured text responses (e.g., get_scene_info returns formatted markdown string) rather than structured JSON, forcing LLMs to parse text. No tool annotations (readOnlyHint/destructiveHint) despite clear read/write distinctions. Parameter descriptions are often single words ('Type of primitive', 'Name of the object') without format guidance, constraints, or examples of valid values.

• Add tool annotations: mark add_primitive, modify_object, create_material, apply_material with destructiveHint=true; mark get_scene_info, list_objects with readOnlyHint=true.
• Convert all tool responses from text/markdown to structured JSON. E.g., get_scene_info should return {filename, object_count, polygon_count, material_count, current_frame, fps, frame_range} instead of formatted string.
• Add enums to primitive_type parameter: ['cube', 'sphere', 'cone', 'cylinder', 'plane', ...]. Document valid material properties in create_material and modify_object.
• Expand parameter descriptions with format/range guidance. E.g., position: 'Array of 3 floats [x, y, z] in world coordinates (range: -10000 to 10000 per axis)'. color: 'Array of 3 floats [R, G, B] with values 0.0-1.0'.
• Enhance error messages with recovery steps. E.g., 'Not connected to Cinema 4D. Ensure Cinema 4D is running on localhost:19000 and the MCP server has network access.' instead of bare error string.

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

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