Hotel AI Agent Observability: Tracing Multi-Agent Handoffs

TL;DR

Multi-agent systems are hard to debug. When a guest has a bad experience, you need to trace: which agents handled the call, what tools they called, what data they used, where handoffs happened, and where decisions went wrong. Here's the observability stack.

Observability Pillars

1. Call trace — every agent activation, tool call, and handoff for a single call
2. Session state — complete conversation and context history
3. Decision logs — why the agent chose a particular action
4. Error tracking — failures, exceptions, retries
5. Performance metrics — latency, throughput, tool timing

Trace Structure

Each call generates a tree:

Call: abc-123
├── Concierge Agent (activated)
│   ├── Tool: lookup_guest_by_phone → {name: "John Smith", loyalty: "Gold"}
│   ├── Tool: detect_intent → "book_room"
│   └── Handoff: → Reservation Agent
├── Reservation Agent (activated)
│   ├── Tool: search_availability → [rooms]
│   ├── Tool: quote_rate → $220
│   ├── Tool: collect_guest_details
│   ├── Tool: process_deposit → {token: "tok_xxx"}
│   └── Tool: create_reservation → {id: "res_789"}
└── Call complete (duration: 3m 42s)

Tools Used

CallSphere uses:

• Langfuse for trace visualization
• OpenTelemetry for distributed tracing
• Datadog for metrics
• Sentry for error tracking
• PostgreSQL for session state persistence

What You Can Debug

• Why did the agent escalate this call?
• Which tool call failed and caused the bad experience?
• Did the handoff carry the right context?
• Why did the agent quote the wrong rate?
• How long did each step take?

Common Observability Wins

• Handoff context loss: agent A passes context but agent B ignores it. Trace reveals the dropped fields.
• Slow tool calls: PMS API takes 4s; agent appears broken. Metric reveals the slow tool.
• Policy hallucination: agent cites wrong policy. Trace shows no RAG call was made — fix agent prompt to require RAG.

FAQ

Q: Is this available in the CallSphere dashboard? A: Basic tracing yes. Full observability requires Langfuse / Datadog integration.

Q: How long are traces retained? A: 90 days default. Longer available on enterprise.

Q: Can I export trace data? A: Yes, via OpenTelemetry exporter.

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Related: Multi-agent architecture playbook | Hotel industry

#Observability #Debugging #CallSphere