{ "name": "performance_stop_trace", "description": "Stops the active performance trace recording on the selected page.", "parameters": { "type": "object", "properties": { "saveToDownloads": { "type": "boolean", "description": "Whether to save the trace as a JSON file in Downloads (default true)." }, "filenamePrefix": { "type": "string", "description": "Optional filename prefix for the downloaded trace JSON." } }, "required": [] } }