Critical gaps across all dimensions. Source code provided shows only imports and Dockerfile/requirements, no actual tool definitions visible. Tool names inferred from file paths (fetch_planet, compare_planets, find_planets, search_articles) but no schemas, descriptions, or parameter definitions are present in the provided code. Cannot verify input schemas, output structures, or error handling.

• Provide complete tool definitions with @mcp.tool() decorators, including full docstrings (50 - 200 chars per pattern:tool-description baseline).
• Add JSON Schema input definitions for all parameters with type, description, enum constraints, and min/max bounds where applicable.
• Document output schemas showing all response fields, types, and pagination support (if applicable).
• Add parameter descriptions explaining format, constraints, and valid values (e.g., 'planet_name (string, 1 - 100 chars): Name of exoplanet to fetch').
• Implement error handling with actionable recovery guidance (e.g., 'Planet not found. Try search_articles() to discover available planets.').