{ "$schema": "https://json-schema.org/draft/2020-12/schema", "$id": "#/components/schemas/letta__schemas__letta_message__ToolReturn", "title": "ToolReturn", "properties": { "type": { "type": "string", "const": "tool", "title": "Type", "description": "The message type to be created.", "default": "tool" }, "tool_return": { "anyOf": [ { "items": { "$ref": "#/components/schemas/LettaToolReturnContentUnion" }, "type": "array" }, { "type": "string" } ], "title": "Tool Return", "description": "The tool return value - either a string or list of content parts (text/image)" }, "status": { "type": "string", "enum": [ "success", "error" ], "title": "Status" }, "tool_call_id": { "type": "string", "title": "Tool Call Id" }, "stdout": { "anyOf": [ { "items": { "type": "string" }, "type": "array" }, { "type": "null" } ], "title": "Stdout" }, "stderr": { "anyOf": [ { "items": { "type": "string" }, "type": "array" }, { "type": "null" } ], "title": "Stderr" } }, "type": "object", "required": [ "tool_return", "status", "tool_call_id" ] }