> ## Documentation Index
> Fetch the complete documentation index at: https://openrouter-d02e98a0-mintlify-7021d5f4.mintlify.site/llms.txt
> Use this file to discover all available pages before exploring further.

# ChatToolMessageContent - Go SDK

> ChatToolMessageContent type definition

<Warning>
  The Go SDK and docs are currently in beta.
  Report issues on [GitHub](https://github.com/OpenRouterTeam/go-sdk/issues).
</Warning>

Tool response content

## Supported Types

###

```go lines theme={null}
chatToolMessageContent := components.CreateChatToolMessageContentStr(string{/* values here */})
```

###

```go lines theme={null}
chatToolMessageContent := components.CreateChatToolMessageContentArrayOfChatContentItems([]components.ChatContentItems{/* values here */})
```

## Union Discrimination

Use the `Type` field to determine which variant is active, then access the corresponding field:

```go lines theme={null}
switch chatToolMessageContent.Type {
	case components.ChatToolMessageContentTypeStr:
		// chatToolMessageContent.Str is populated
	case components.ChatToolMessageContentTypeArrayOfChatContentItems:
		// chatToolMessageContent.ArrayOfChatContentItems is populated
}
```