> ## 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.

# ChatToolMessage - Go SDK

> ChatToolMessage 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 message

## Fields

| Field        | Type                                                                                             | Required             | Description                                                    | Example                                         |
| ------------ | ------------------------------------------------------------------------------------------------ | -------------------- | -------------------------------------------------------------- | ----------------------------------------------- |
| `Content`    | [components.ChatToolMessageContent](/client-sdks/go/api-reference/models/chattoolmessagecontent) | :heavy\_check\_mark: | Tool response content                                          | The weather in San Francisco is 72°F and sunny. |
| `Role`       | [components.ChatToolMessageRole](/client-sdks/go/api-reference/models/chattoolmessagerole)       | :heavy\_check\_mark: | N/A                                                            |                                                 |
| `ToolCallID` | `string`                                                                                         | :heavy\_check\_mark: | ID of the assistant message tool call this message responds to | call\_abc123                                    |