Multi-Agent Delegation Chain Logging
Log and attribute every action in a multi-agent system with sufficient detail to trace any action back to its originating instruction, authorized agent, and human principal.
Objective
Maintain an auditable chain of custody across multi-agent architectures so that any action — including those taken by deeply nested subagents — can be traced to the human principal who initiated it.
Maturity Levels
Initial
Agent actions are logged individually but without parent-task context; delegation chains cannot be reconstructed.
Developing
Orchestrator-level actions are logged with task IDs, but subagent actions reference only the calling agent, not the originating instruction.
Defined
Every agent action is stamped with a trace ID that links it to the originating human request, delegating agent, and authorization scope.
Managed
Delegation chain logs are queryable; compliance teams can reconstruct any action chain on demand within the audit trail SLA.
Optimizing
Trace IDs propagate automatically through all agent frameworks in use; gaps in chain coverage trigger automated alerts.
Evidence Requirements
What an auditor or assessor would expect to see for this control.
- —Logging schema documentation showing trace ID propagation fields and delegation chain structure
- —Sample reconstructed delegation chains demonstrating end-to-end traceability from human instruction to subagent action
- —Tamper-evidence controls documentation (append-only store, log integrity verification)
- —Maximum delegation depth policy and alerting configuration
- —Audit trail retrieval demonstration: ability to pull a complete delegation chain within the defined SLA
Implementation Notes
Key steps
- Assign a globally unique trace ID to every human-initiated task; propagate this ID to every spawned subagent and every tool call.
- Log at minimum: trace ID, parent task ID, agent ID, action type, inputs, outputs, authorization scope active at time of action, and timestamp.
- Ensure logs are append-only and tamper-evident — agent systems should not be able to modify their own logs.
- Define the maximum delegation depth permitted per task; alert when chains exceed this limit.
- Require that any agent that spawns another agent records both the delegation instruction and the scope it is passing to the subagent.
Example Implementation
Legal team deploying a contract review orchestrator with document retrieval and clause analysis subagents
Delegation Chain Log — Trace ID: cr-20260531-0047
| Seq | Agent | Action | Inputs (summary) | Auth scope | Parent task |
|---|---|---|---|---|---|
| 1 | Human (jsmith) | Initiate contract review | Contract ID 9921 | Full access | — |
| 2 | Orchestrator | Spawn retrieval agent | trace_id=cr-20260531-0047, doc=9921 | read:contracts | human-1 |
| 3 | Retrieval Agent | Fetch document | doc=9921 | read:contracts | orchestrator-2 |
| 4 | Orchestrator | Spawn clause agent | sections=[3,7,12] | read:contracts | human-1 |
| 5 | Clause Agent | Analyze section 7 | section_text=... | read:contracts | orchestrator-4 |
| 6 | Orchestrator | Compile report | clause_results=... | write:reports | human-1 |