Single tool 'execute_skill_action' has a descriptive name starting with a verb, but critical quality gaps undermine usability. Description is 127 chars (within 10-1024 range) but lacks WHEN/WHY context for LLM selection. Input schema present with 3 parameters, all with type strings and descriptions, but parameters use free-form strings instead of enums for constrained values (stress_level, sleep_quality, energy_pattern are domain-specific and should be enums). Output schema is completely undocumented, the client.py shows a hardcoded response structure, but no schema is exposed to the MCP protocol. No error handling guidance, no recovery paths, no validation rules in descriptions. Tool does not declare what it modifies or whether it's idempotent. Defaults are present but not justified. Overall: tool is minimally viable but lacks production-grade rigor.

• Add explicit enum constraints to stress_level, sleep_quality, and energy_pattern parameters. Replace description examples with formal enums: stress_level: enum ['low', 'moderate', 'high'], sleep_quality: enum ['restless', 'interrupted', 'normal', 'deep'], energy_pattern: enum ['afternoon_slump', 'low_morning_energy', 'stable', 'variable'].
• Document the complete output schema in the MCP tool definition. Include field names, types, and descriptions for all 6 response fields (kampo_constitution_type, root_cause_diagnosis, prescribed_herbal_tincture, dietary_guidelines, wellness_adherence_plan_days, herbal_purity_certified).
• Expand tool description to 150-250 chars. Add: (1) WHAT it does (analyzes constitution based on mind-body parameters), (2) WHEN to use it (when user reports stress, sleep, or energy concerns), (3) WHAT it returns (constitution type, herbal prescription, dietary guidelines), (4) whether it modifies state (read-only).
• Add error handling guidance. Document expected error cases: 'If parameters are invalid, returns error with valid enum values. If analysis fails, returns error with retry guidance.' Include a recovery pattern: 'If analysis fails, verify stress_level, sleep_quality, and energy_pattern are valid enum values.'
• Declare tool permissions and idempotency. Add to description: 'This tool is read-only and idempotent, safe to call multiple times with the same input. Requires no special permissions. Results are deterministic based on input parameters.'