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"originalFile": "\"\"\"Databases Tool - Listet verfügbare Datenbanken auf.\"\"\"\nimport sys\nimport time\n\nsys.path.insert(0, \"\/opt\/mcp-servers\/mcp-db\")\nsys.path.insert(0, \"\/var\/www\/mcp-servers\/shared\")\n\nfrom constants import LOG_ENTRY_MAX_LENGTH, LOG_QUERY_MAX_LENGTH, MS_PER_SECOND\n\nfrom config import Config\nfrom domain.log_contract import LogEntry\nfrom infrastructure.db_connection import DatabaseConnection\nfrom infrastructure.protokoll_logger import ProtokollLogger\n\n\ndef register_databases_tool(mcp) -> None:\n \"\"\"Registriert db_databases Tool.\"\"\"\n logger = ProtokollLogger()\n\n @mcp.tool()\n def db_databases() -> dict:\n \"\"\"\n Listet alle verfügbaren Datenbanken auf.\n\n Returns:\n Dict mit databases (Liste der erlaubten DBs mit Tabellen-Count)\n \"\"\"\n start = time.time()\n\n try:\n # Verbinde zu einer erlaubten DB um Queries auszuführen\n with DatabaseConnection.get_connection(\"ki_dev\") as conn:\n cursor = conn.cursor(dictionary=True, buffered=True)\n\n databases = []\n for db_name in Config.ALLOWED_DATABASES:\n cursor.execute(\n \"\"\"SELECT COUNT(*) as table_count\n FROM information_schema.tables\n WHERE table_schema = %s\"\"\",\n (db_name,),\n )\n row = cursor.fetchone()\n table_count = row[\"table_count\"] if row else 0\n\n databases.append({\n \"name\": db_name,\n \"tables_count\": table_count,\n })\n\n cursor.close()\n\n duration = int((time.time() - start) * MS_PER_SECOND)\n\n # Log\n try:\n logger.log(\n LogEntry(\n request=\"SHOW DATABASES (filtered)\",\n status=\"success\",\n duration_ms=duration,\n )\n )\n except Exception:\n pass\n\n return {\n \"status\": \"success\",\n \"databases\": databases,\n \"execution_ms\": duration,\n }\n\n except Exception as e:\n duration = int((time.time() - start) * MS_PER_SECOND)\n\n try:\n logger.log(\n LogEntry(\n request=\"SHOW DATABASES\",\n status=\"error\",\n duration_ms=duration,\n error_message=str(e)[:100],\n )\n )\n except Exception:\n pass\n\n return {\n \"status\": \"error\",\n \"error\": str(e)[:200],\n \"execution_ms\": duration,\n }\n",
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