Struct ToolCall 

pub struct ToolCall {
    pub id: String,
    pub session_id: String,
    pub timestamp: DateTime<Utc>,
    pub tool_name: String,
    pub input: Value,
    pub duration_ms: Option<u64>,
    pub output: Option<String>,
}

A tool call extracted from a session JSONL file

Combines tool_use (from assistant messages) with tool_result (from user messages) to compute duration and capture output.

Fields

id: String

Tool call ID (from tool_use block)

session_id: String

Session this tool call belongs to

timestamp: DateTime<Utc>

Timestamp when the tool was called (from assistant message)

tool_name: String

Tool name (e.g., “Read”, “Bash”, “WebFetch”, “mcp__server__tool”)

input: Value

Input parameters as JSON

duration_ms: Option<u64>

Duration from call to result in milliseconds (None if no result found)

output: Option<String>

Tool output content (from tool_result block, truncated preview)

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.