Description

In OpenClaw v2026.3.28, attempting to use sessions_spawn to create an isolated sub-agent results in an error: 'agentId is not allowed for sessions_spawn (allowed: none)'.

Context

• Version: OpenClaw 2026.3.28
• Environment: Main agent running in a WhatsApp direct chat session.
• Constraint: The system rejects any agentId for sessions_spawn even when the intention is to spawn a standard subagent.

Actual Behavior

The tool call fails with 'forbidden' / 'allowed: none' status, making task parallelization impossible.