# HarnessToolResultBlockDelta
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A delta update to a tool result content block.

## Contents
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**Important**  
This data type is a UNION, so only one of the following members can be specified when used or returned.

 ** json **   <a name="BedrockAgentCore-Type-HarnessToolResultBlockDelta-json"></a>
A JSON tool result delta.  
Type: JSON value  
Required: No

 ** text **   <a name="BedrockAgentCore-Type-HarnessToolResultBlockDelta-text"></a>
A text tool result delta.  
Type: String  
Length Constraints: Minimum length of 1.  
Required: No

## See Also
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For more information about using this API in one of the language-specific AWS SDKs, see the following:
+  [AWS SDK for C\$1\$1](https://docs.aws.amazon.com/goto/SdkForCpp/bedrock-agentcore-2024-02-28/HarnessToolResultBlockDelta) 
+  [AWS SDK for Java V2](https://docs.aws.amazon.com/goto/SdkForJavaV2/bedrock-agentcore-2024-02-28/HarnessToolResultBlockDelta) 
+  [AWS SDK for Ruby V3](https://docs.aws.amazon.com/goto/SdkForRubyV3/bedrock-agentcore-2024-02-28/HarnessToolResultBlockDelta)