Server has 11 well-structured tools with explicit FastMCP registration. All tools have descriptions (range 40-200 chars, compliant with 10-1024 char baseline). All tools have documented input parameters with types and descriptions. However, there are significant gaps: (1) Output schemas are not documented, tools return JSON strings but the structure of that JSON is never declared, forcing LLMs to infer response fields. (2) No enums for constrained parameters like 'axis' (x/y/z), 'profile_type' (machine/filament/process/all), and 'vendor', these invite hallucinated values. (3) Parameter descriptions lack format constraints (e.g., no mention of path validation, no file format restrictions beyond examples). (4) Error handling is not visible in source, no indication of retryability, validation, or recovery guidance. (5) Two tools (mesh_repair, mesh_scale, mesh_rotate, mesh_mirror, slicer_slice, slicer_export_3mf) modify files but descriptions do not explicitly state 'modifies state' per pattern:command-tool. (6) No parameter bounds for numeric inputs (e.g., clearance_pct, angle_degrees, plate index). Tools are named well (verb_noun pattern) and descriptions cover WHAT and sometimes WHEN, but lack the full pattern:tool-description completeness.

• Document output schemas for all 11 tools. For each tool, declare the JSON structure returned (e.g., mesh_analyze returns {dimensions: {x, y, z}, vertices: int, faces: int, watertight: bool, non_manifold_edges: int, volume: float}).
• Convert constrained string parameters to enums: axis → enum[x, y, z], profile_type → enum[machine, filament, process, all], vendor → enum[BBL, all].
• Add bounds to numeric parameters: angle_degrees (0-360 or ±180), clearance_pct (0-100), plate (0-N where N is max plate count), target_*_mm (1-500), factor (0.01-10.0).
• Explicitly state in descriptions which tools modify state: Start descriptions of mesh_repair, mesh_scale, mesh_rotate, mesh_mirror, slicer_slice, slicer_export_3mf with 'Modifies files:' or similar. Per pattern:command-tool, agents need to know irreversible operations.
• Expand vague descriptions (mesh_rotate, slicer_model_info) to 100+ characters. Include WHEN to use the tool, what distinguishes it from similar tools, and what the output contains.
• Add format/validation constraints to file paths: 'Absolute path to a 3D model file (STL, OBJ, or 3MF format only; max 2 GB).' Be specific about supported formats and limits.
• Add parameter relationship documentation: In mesh_scale, clarify that 'factor' and 'target_*_mm' are mutually exclusive, you must specify one, not both. Document the precedence.
• Add error guidance: Document what happens if a file is not found, not a supported format, or unreadable. E.g., 'If the file is not found, the tool returns an error with the path that was attempted, verify the path and try again.'