ToolCall

Request for the client or the agent to execute the specified tool.

JSON representation 
{
  "id": string,
  "displayName": string,
  "args": {
    object
  },
  "parentToolCallId": string,
  "agentName": string,

  // The following is a list of mutually exclusive fields. At most one of the
  // fields will be set in a response:
  "tool": string,
  "toolsetTool": {
    object (ToolsetTool)
  }
  // End of mutually exclusive fields.
}
Fields
id

string

Optional. The unique identifier of the tool call. If populated, the client should return the execution result with the matching ID in ToolResponse.
displayName

string

Output only. Display name of the tool.
args

object (Struct format)

Optional. The input parameters and values for the tool in JSON object format.
parentToolCallId

string

Output only. The id of the tool call that caused this one, when it was issued by a sub-agent working on behalf of a parent call. Empty for top-level calls. Lets a client group a sub-agent's work under the call that started it instead of rendering every step as a sibling.
agentName

string

Output only. Human-readable name of the agent that issued this call, e.g. "Contract Architect". Empty when the root agent issued it.
The identifier of the tool to execute. It could be either a persisted tool or a tool from a toolset. The following is a list of mutually exclusive fields. At most one of the fields will be set in a response:
tool

string

Optional. The name of the tool to execute. Format: projects/{project}/locations/{location}/apps/{app}/tools/{tool}
toolsetTool

object (ToolsetTool)

Optional. The toolset tool to execute.
End of mutually exclusive fields.