Single tool with adequate schema but critical gaps in description quality and parameter documentation. Tool name lacks action verb. Description is 156 chars (within range) but lacks WHEN/WHY guidance. Input schema present with types and descriptions, but parameters lack actionable constraints. No output schema documented. No error handling guidance. Fails multiple baseline checks: descriptions under 200 chars should be more specific; parameters lack format/range constraints; no recovery guidance for failures.

• Rename tool to 'solve_csp_map_coloring' or 'find_map_coloring_solution' to start with action verb and clarify intent.
• Add output schema documentation: 'Returns {solution: {[variable_name]: color_value}} if solvable, or {error: string, suggestion: string} if unsolvable.'
• Enhance parameter descriptions with constraints: domains description should state 'Each domain must be a non-empty array of strings (e.g., ["red", "blue", "green"]). Empty domains cause immediate failure.'
• Add error recovery guidance: 'If no solution found, try: (1) expanding domain values, (2) removing redundant constraints, (3) using fewer variables.'
• Expand tool description to include: 'Use this for graph coloring, scheduling, and resource allocation problems with binary inequality constraints. Applies AC-3 arc consistency and MRV backtracking. Supports only binary constraints (e.g., A ≠ B).'
• Document timeout behavior: 'Large problems (>20 variables) may timeout. Consider decomposing into subproblems.'