Critical failures across all dimensions. Tool definitions lack proper schemas, descriptions are incomplete or duplicated, and parameter documentation is minimal. The server registers 3 tools but two are duplicates with conflicting schemas (guardar_relatorio appears twice with different parameter names: 'nome_arquivo' vs 'nome_fornecido'). No input validation, error handling guidance, or output schema documentation. Naming is acceptable (verb_noun pattern) but insufficient to overcome structural deficiencies.

• Remove duplicate guardar_relatorio definition. Keep one canonical version with consistent parameter naming (e.g., 'nome_arquivo' and 'conteudo').
• Add explicit JSON Schema constraints: guardar_relatorio should validate filename format (regex: ^[a-zA-Z0-9_-]+\.txt$), content length limits, and directory traversal protection (no '../' paths).
• Document output schemas for all tools. E.g., buscar_dados_transparencia should return {results: [{id, orgao, valor, data}], total_count, next_cursor} instead of raw text.
• Add error handling with recovery guidance: 'If write fails due to permissions, ensure the 'relatorios' directory exists and is writable. If filename contains invalid characters, use only alphanumeric, dash, underscore.'
• Replace example values in descriptions with formal constraints. Instead of 'ex: fraude_cafe.txt', use 'Must match pattern: [a-zA-Z0-9_-]+\.txt and be under 255 characters.'