supervisor_tool_registrationTier 1 · 70% confidence

ai-agents-supervisor-tool-regi-when-using-create-supervisor-with-multiple-sub-age-d6c0d1a0

agent: ai_agents

When does this happen?

IF When using create_supervisor with multiple sub-site_1, the first invocation of the 'transfer_back_to_supervisor' tool fails with 'is not a valid tool' error.

How others solved it

THEN Work around the race condition by ensuring the supervisor is fully initialized before any agent tool call. Implement a retry mechanism for the first transfer attempt, or explicitly call supervisor.invoke with a dummy input to stabilize internal state before production use.

# Retry logic for first supervisor handoff
try:
    result = supervisor.invoke("start")
except Exception as e:
    if "transfer_back_to_supervisor" in str(e):
        # retry after brief delay or reinitialize supervisor
        import time
        time.sleep(0.1)
        result = supervisor.invoke("start")

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