Struct ToolContext 

pub struct ToolContext {
    pub call_id: String,
    pub name: String,
    pub working_dir: PathBuf,
    pub cancel: CancellationToken,
    pub events: UnboundedSender<AgentEvent>,
    pub session_path: Option<PathBuf>,
}

Fields

call_id: String

name: String

working_dir: PathBuf

cancel: CancellationToken

The run’s cancel token. A tool that needs clean-up must watch this and finish BEFORE returning (e.g. bash kills its process group); the loop only backstops a tool that ignores it, racing the call and recording a synthetic error ToolResult (“aborted: cancelled before the tool returned”) if the token fires first.

events: UnboundedSender<AgentEvent>

session_path: Option<PathBuf>

The current run’s session transcript path, when it has one — None for an in-memory session. session_search (scope:"current") reads it to recover turns a compaction replaced with a summary.