Struct PreToolUseEvent 

pub struct PreToolUseEvent {
    pub tool_name: String,
    pub tool_input: Value,
    pub tool_use_id: String,
    pub history: Vec<Value>,
}

Snapshot passed to an automatic pre-tool hook.

history contains structured messages up to the pending call, before its result is added. A decision can block the call or replace its input.

Fields

tool_name: String

Name of the tool about to be executed (e.g., “Bash”, “Read”, “Edit”)

tool_input: Value

Input parameters for the tool as a JSON value

tool_use_id: String

Unique identifier for this tool use (for correlation with PostToolUseEvent)

history: Vec<Value>

Structured JSON snapshot of conversation history before this tool call executes.

Implementations

impl PreToolUseEvent

pub fn new( tool_name: String, tool_input: Value, tool_use_id: String, history: Vec<Value>, ) -> Self

Creates a new PreToolUseEvent.

This constructor is typically called by the agent runtime, not by user code. Users receive instances of this struct in their hook handlers.

Trait Implementations

impl Clone for PreToolUseEvent

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl Debug for PreToolUseEvent

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

Formats the value using the given formatter.