1. A live diagnostic task

planner: model (claude-sonnet-5)manual search: local stubtickets and parts: synthetic training dataMCP 2026-07-28

The agent is given a machine and a symptom, nothing else. It has to work out which tools it needs, in what order, and what to put in their arguments. Watch the second call: its arguments could only be filled from the first call's result.

The task

Unit AC-250-S serial AC25041872 at Immingham Depot: discharge temperature climbs above the trip point under sustained load and the machine shuts down after about 20 minutes at full load. Diagnose it, identify the correct replacement part for this exact variant, and cite the manual procedure.

The answer key — fault F-101, part AC-THE-1006S — is a property of the generated corpus: one variant-specific remedy part exists per fault. The agent never sees it, and the grading below is a string comparison, not a judgement.

Outcome

Checked against the answer key	Result
Fault code identified	no `F-101`
Variant-specific part number	no `AC-THE-1006S`
End to end	no
Distinct tools called	0 —
Wall clock	7097 ms
Trace	`3e51dbae361547e4`

Answer

I don't have access to the service manual or parts database for the AC-250-S, so I can't provide a verified diagnosis, exact part number, or manual citation for that specific serial number. For an accurate diagnosis of the discharge temperature trip issue, you'll need to consult the official manufacturer's service documentation for that unit variant. The correct replacement part and procedure should be confirmed through the manufacturer's parts catalog or an authorized service center. If you can share the service manual or parts list you have on hand, I can help interpret it.

The run, step by step

Each plan step shows the tool the planner chose and the scores of the runners-up. Each tool step shows exactly what was sent and what came back over MCP.

step 1: finish0.3 ms

planner failed: TypeError: atlas_shared.llm.LLM.complete() got multiple values for keyword argument 'span_name'

answer0.0 ms

Three servers, one task

The three tools live on three separate MCP endpoints with separate identities and separate tool namespaces. The agent's client reached each over HTTP POST with the headers this protocol revision requires.

Endpoint	Server identity	Tools
`/mcp/tickets`	`atlas.field-service.tickets`	`export_service_records`, `get_ticket`, `post_ticket_update`, `search_tickets`
`/mcp/parts`	`atlas.field-service.parts`	`check_availability`, `find_part`, `raise_parts_order`
`/mcp/manuals`	`atlas.field-service.manuals`	`search_manual`

Run executed when you loaded this page. Nothing on this screen is hardcoded; the source is in Demo4/pipeline/.