This server has critical definition gaps. Tool descriptions are present but minimal (10-50 chars, well below the 194-char baseline). Most parameters lack descriptions entirely, only 'name' and 'query' params have any text. No output schemas are documented. Tool naming is inconsistent: 'read_query', 'run_sql_query', and 'write_query' are near-duplicates that confuse intent. No error handling guidance. SQL injection risk is unmitigated, raw query parameters invite prompt injection attacks. The server exposes destructive operations (delete_query) without confirmation or permission gates.

• Consolidate 'read_query', 'run_sql_query', 'write_query' into a single 'execute_query' tool with a 'mode' enum parameter (read|write|update|delete) and clear descriptions of when each mode applies.
• Add output schema documentation to every tool. Example: 'Returns: {success: boolean, rows: array<object>, rowCount: number, error?: string}'.
• Implement parameterized queries using pg library's $1, $2 placeholders. Never interpolate user input directly into SQL strings. Validate table/column names against information_schema before execution.
• Add a 'dry_run' boolean parameter to create_table, alter_table, write_query, update_query, delete_query. When true, return the query that would execute without actually running it.
• Expand tool descriptions to 50-150 characters explaining WHAT the tool does, WHEN to use it, and any prerequisites. Example: 'Execute a read-only SELECT query. Use this to fetch data; for modifications, use write_query or update_query instead.'