Describes a request from the LLM to call a specific tool/function.
ToolCallRequest
Optional
Gemini thought signature for this call, kept so the next Gemini 3 turn can replay it. See ChatMessage.tool_calls[].thoughtSignature.
ChatMessage.tool_calls[].thoughtSignature
Describes a request from the LLM to call a specific tool/function.
Interface
ToolCallRequest