This server presents 3 well-named tools with complete input schemas and generally strong descriptions. Tool names follow verb_noun convention (generate_3d_model, check_api_balance). Parameter descriptions are detailed and include constraints (e.g., texture_resolution enum, foreground_ratio range 0.1 - 1.0, vertex_count -1 to 20000). However, output schemas are not formally documented, the functions return plain strings ('Successfully generated 3D model: {out_path}' or error messages) rather than structured objects. There is basic parameter validation in the code but no documented error recovery guidance. All three tools have descriptions exceeding 100 characters, meeting the baseline. Parameter descriptions average 60 - 100 characters and include ranges, enums, and rationale.

• Define and document output schemas as structured objects, not plain strings. For generate_3d_model, return {success: bool, message: string, file_path: string, file_size_bytes: int, generation_time_ms: int, texture_resolution: string}. This enables downstream tools to extract and reuse fields.
• Replace string error responses with structured error objects including error_code, error_message, constraint_violated, and suggested_recovery. E.g., {error_code: 'INVALID_PARAM', param: 'texture_resolution', constraint: 'must be one of: 512, 1024, 2048', suggested_recovery: 'Try 1024 for balanced quality and performance'}.
• Add explicit state-changing declarations to tool descriptions. Start descriptions of generate_3d_model and generate_3d_model_from_base64 with 'This tool writes a GLB file to disk. The operation is idempotent, overwriting the output file if it exists.'
• Document API key setup in tool descriptions or add a discovery tool (e.g., get_api_balance or check_api_setup) that validates STABILITY_API_KEY is set and returns account status. This surfaces setup requirements early.
• Add per-parameter validation guidance in descriptions. E.g., foreground_ratio description already includes range and reasoning; extend all params similarly. 'vertex_count (integer, -1 to 20000): Target vertex count. -1 (default) = no simplification. Higher values retain more detail; lower values reduce file size. -1 is recommended unless file size is a constraint.'
• Consider adding optional parameters for error tolerance, retry behavior, and timeout configuration, documented in parameter descriptions.