Stable agent identifier (branch handle at creation time)
The agent's branch — still alive when returned from useAgentPool
Agent's research findings (from terminal tool or final output), or null
Parent branch handle — shared root for top-level agents, parent agentId for sub-agents
Model-level perplexity at completion (exp of mean NLL from raw logits)
Sampling-level perplexity at completion (from filtered distribution)
Total tokens generated by this agent
Number of tool calls the agent made
OptionaltracePer-token trace data (present only when AgentPoolOptions.trace is true)
Result for a single completed agent