Athena MCP exhibits mixed quality. Tool schemas are present and well-structured with proper JSON Schema validation (patterns, enums, minItems/maxItems constraints). However, descriptions are in Portuguese and lack LLM-optimized English clarity. Critical gaps: no output schemas documented, no error handling guidance, no parameter descriptions for several fields (e.g., 'verification', 'profile', 'constraints'). The server exposes complex internal concepts (execution_id, request_id, task_handle) without accepting natural identifiers. Tool composition is reasonable (7 focused tools), but descriptions are too brief (avg ~60 chars) and lack actionable context for LLM selection.

• Translate all descriptions to English and expand to 80-150 characters. Include WHAT (e.g., 'Executes a modular sequence of attempts with fallback'), WHEN (e.g., 'Use when a primary provider fails'), and any prerequisites (e.g., 'Requires task_type and risk_level').
• Document output schemas for all tools. For run_combo and ask_provider, declare the structure of execution results (state, exit_code, stdout, stderr, duration_s, error). For list_executions, declare pagination fields (total, limit, offset) and per-item structure.
• Add descriptions to all parameters currently missing them: 'verification' (what claims to verify?), 'profile' (which execution profiles are valid?), 'constraints' (format and examples), 'expected_output' (what structure is expected?).
• Provide lookup tools or accept natural identifiers. Either add a 'search_executions' tool that returns execution_id by name/pattern, or modify get_execution to accept partial matches (e.g., 'recent' for the latest execution).
• Add error handling guidance to each tool description. E.g., 'If task_handle not found, returns 404 with available task handles. If execution times out, returns timeout error, retry with increased overall_timeout_s.'