Multi-Agent Delegation Chain Logging
Added May 2026
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 |