This server has critical gaps in parameter descriptions and output schema documentation. All 5 tools have basic input schemas with types, but 3 of 5 tools (composite, kepler_candidates, microlensing) lack descriptions for their 'query' and 'limit' parameters. Tool names are generic (planets, composite, kepler_candidates) rather than action-verb-prefixed (search_planets, query_composite, list_kepler_candidates), reducing clarity for LLM tool selection. No output schemas are documented, LLMs cannot predict what fields to expect from results. Error handling is minimal: runQuery() throws generic errors without recovery guidance. The 'planets' tool description is adequate (72 chars), but 'composite', 'kepler_candidates', and 'microlensing' descriptions are too terse (20-30 chars), violating the 10-1024 char baseline. No pagination support despite the TAP API potentially returning thousands of exoplanet records.

• Rename tools to action-verb patterns: 'search_planets', 'query_composite_parameters', 'list_kepler_candidates', 'search_microlensing_events'. This helps LLMs infer intent from the name alone.
• Expand descriptions for composite, kepler_candidates, microlensing to 50-150 chars each. Example: 'Search the composite planet parameter table (pscomppars) with optional WHERE clause. Returns up to 10,000 records with planet properties like mass, radius, equilibrium temperature.'
• Add descriptions to all 'query' and 'limit' parameters. Example: 'query: Optional WHERE clause (e.g., "pl_name LIKE \'Earth%\'"). limit: Number of results (1-10000, default 25).'
• Document output schemas for each tool. Example for planets: 'Returns array of objects with fields: pl_name (string), sy_dist (float), pl_bmassj (float), pl_radj (float), etc. See https://exoplanetarchive.ipac.caltech.edu/docs/TAP/usingTAP.html for full schema.'
• Add pagination: return total_count and next_offset in responses. Modify tableQuery() to accept offset parameter and return {results: [...], total_count: N, offset: M} so agents can iterate large result sets.