Bedrock AgentCore > Structures > HarnessToolResultBlockStart HarnessToolResultBlockStart¶ Structure Class¶ HarnessToolResultBlockStart dataclass ¶ Start payload for a tool result content block. Attributes¶ status class-attribute instance-attribute ¶ status: str | None = None The status of the tool execution. tool_use_id instance-attribute ¶ tool_use_id: str The tool use ID that this result corresponds to.