Struct ToolCall 

pub struct ToolCall {
    pub id: String,
    pub name: String,
    pub args_json: String,
    pub signature: Option<String>,
    pub approval_turn_id: Option<String>,
}

A tool call emitted by the model inside an assistant Message.

Mirrors the wire-side polychrome.agent.v1.ToolCall; surfaced inside a Content::ToolUse block.

Fields

id: String

Provider-assigned call identifier, used to correlate with ToolResult.

name: String

Name of the tool being called.

args_json: String

Arguments serialized as a JSON string (opaque at this layer).

signature: Option<String>

Opaque, provider-specific signature attached to this call (e.g. a thinking model’s thought signature). Some providers require it to be echoed back verbatim on the follow-up request that carries this call in the history; None when the provider emits no such token.

approval_turn_id: Option<String>

Durable turn that emitted this call, when reconstructed from the event log for an approval resume. Provider output leaves it unset.

Trait Implementations

impl Clone for ToolCall

fn clone(&self) -> ToolCall

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Debug for ToolCall

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl<'de> Deserialize<'de> for ToolCall

fn deserialize<__D>(__deserializer: __D) -> Result<Self, __D::Error>

where __D: Deserializer<'de>,

Deserialize this value from the given Serde deserializer.

impl Serialize for ToolCall

fn serialize<__S>(&self, __serializer: __S) -> Result<__S::Ok, __S::Error>

where __S: Serializer,

Serialize this value into the given Serde serializer.