Single tool 'execute_skill_action' has critical definition gaps. Description is generic (73 chars, below 100-char minimum for clarity). Input schema exists but parameter 'query_payload' lacks actionable guidance, no format, constraints, or examples. No output schema documented; tool returns hardcoded JSON string without structure definition. No error handling, recovery guidance, or idempotency markers. Tool name lacks verb clarity ('execute_skill_action' is vague; 'process_document' or 'extract_layout' would be clearer for OCR use case). No parameter validation rules, no field-level descriptions in response. Fails 6+ critical checks from rubric section D (Schemas & Output) and E (Error Handling).

• Rename tool to 'extract_document_layout' or 'parse_pdf_structure' to clarify domain and action. Start with a verb that reflects OCR/layout extraction.
• Expand description to 100 - 200 chars: 'Extract layout structure, tables, and text bounding boxes from PDF documents. Returns hierarchical tree of page elements (headers, tables, paragraphs) with coordinates. Call this to analyze document structure before processing content.'
• Document output schema with typed fields: { document_extraction_id: string, pages_parsed_count: number, tabular_structures_extracted_count: number, bounding_box_hierarchical_tree: Array<{type: enum, text?: string, rows?: number, cols?: number, page: number, bbox: [number, number, number, number]}>, structured_markdown_export_url: string }
• Replace 'query_payload' parameter with explicit fields: 'pdf_base64' (string, base64-encoded PDF), 'extract_tables_as_html' (boolean, default true), 'include_text_bounding_boxes' (boolean, default true). Add format and constraint descriptions to each.
• Add error handling: return { status: 'ERROR', error_code: 'INVALID_PDF' | 'TIMEOUT' | 'UNSUPPORTED_FORMAT', message: '<actionable guidance>', retry_after_seconds?: number } on failure. Document which errors are retryable.