Three tools with basic schemas and descriptions, but significant gaps in parameter documentation, output schema clarity, and error handling guidance. Tool names lack action verbs (analyze_logs is acceptable, but gsc_crossref and parity_report are vague). Parameter descriptions are minimal or missing. No documented output schemas. Error handling returns JSON strings instead of structured error objects with recovery guidance. Descriptions are present but generic (10-50 chars for some params). No input validation constraints (enums, ranges, patterns) documented. Composition is reasonable but tools lack idempotency guarantees and chaining metadata.

• Rename 'gsc_crossref' to 'cross_reference_gsc' and 'parity_report' to 'generate_parity_report' to start with action verbs and clarify intent.
• Add detailed parameter descriptions: 'logs_analysis: Output from analyze_logs tool containing googlebot_requests, ai_crawler_requests, parity_ratio, and parity_level fields.' Include expected structure and format.
• Document output schemas explicitly. For analyze_logs, declare: 'Returns object with fields: googlebot_requests (int), ai_crawler_requests (int), parity_ratio (float 0-100), parity_level (enum: high_parity|medium_parity|low_parity|insufficient_data), paths_googlebot (int), paths_ai_crawler (int), unique_paths (int).'
• Replace error handling with structured error objects. Instead of returning JSON string with 'error' field, return: {type: 'text', text: 'Error: log file not found at /path/to/file. Ensure the path is absolute and the file exists.'} with recovery guidance.
• Add input validation: document that log_path must be an absolute file path to a readable Nginx combined-format log file; gsc_data must be an array of objects with fields: page (string), impressions (int), clicks (int), ctr (float), position (float).