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Agent-to-agent interoperability

Cross-agent identity propagation

Preserve actor and tenant context across agent-to-agent handoffs

A task crosses teams, gateways or vendor systems. The decision is how to preserve actor and tenant context across agent-to-agent handoffs. The work begins with your actual workflow and looks for the evidence that separates intended behaviour from a consequential exception. It is particularly relevant to identity architects and multi-agent platform engineers. A useful outcome is an explicit account of what was examined, what remains uncertain, and which decision the evidence can support.

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The interaction contracts relationship

  1. Starting evidenceIdentity claims

    Establish the basis for original requester.

  2. Decision boundaryDelegation chain

    Record who narrowed and transferred authority.

  3. Decision artefactCross-agent identity propagation design

    Retain the scoped finding and its unresolved dependencies.

Proposed working model. Untested peers require their own compatibility evidence.

Decision

Frame the decision around original requester

Questions and the evidence they need

Criterion / evidenceOriginal requester
Inspect identity claims for the relevant constraint or observation.
Criterion / evidenceDelegation chain
Inspect delegation chains for the relevant constraint or observation.
Criterion / evidenceExecuting resource
Inspect tenant mappings for the relevant constraint or observation.
Read each criterion against the available evidence before deciding that additional work is needed.

The decision is how to preserve actor and tenant context across agent-to-agent handoffs. This is relevant to identity architects and multi-agent platform engineers when a task crosses teams, gateways or vendor systems. Name the affected workflow, the consequence of a wrong decision, and the owner who can act on the result. The initial discussion should establish which evidence is already available and which uncertainty is material enough to investigate.

The specific failure hypothesis is that the originating user’s restrictions disappear when a receiving agent uses its own identity. It remains a hypothesis until examined in the deployment. Existing internal tests or operating records may already resolve it; identify the uncovered question before commissioning additional work.

Mechanism

Identity context should survive the agent-to-agent handoff

Relationships within interaction contracts

Source or conditionOriginal requester
Retain the initiating user and tenant.
Crossing or choiceDelegation chain
Record who narrowed and transferred authority.
Consequence or decisionExecuting resource
Attribute the operation to the accepted mandate.
Compare authority and state at the receiving boundary. Each relationship needs evidence in the actual scope.

What this specialty examines

Cross-agent identity propagation should preserve both actor and origin context without blindly forwarding credentials. Identify the authenticated sender, original requester, tenant and delegation scope. Each receiving boundary needs a clear rule for which claims it trusts and how it verifies them.

The review should trace who requested, delegated, executed and authorised each action across the handoff. Identify the normal route, relevant exceptions and the authoritative record of the outcome. Inspect the relevant business-system record, enforcement event or process evidence alongside any reported status. Keep incomplete cases visible, with an explanation of what their absence prevents the owner from concluding.

The tradeoff to make explicit

For this decision, rich context supports accountability while forwarded identity must be validated rather than blindly trusted. Compare the available design or operating choices against the same intended outcome. If one option removes a required control or changes the task boundary, describe that difference before treating its apparent simplicity, speed or lower effort as an improvement. The decision should expose the tradeoff instead of burying it in an aggregate score.

Preparation

Connect the working inputs to the boundary being examined

Evidence packet for original requester

Illustrative working format

BasisIdentity claims
Use nonsecret metadata to trace issuance, acceptance, and withdrawal responsibility.
ContextDelegation chains
Locate transfer of responsibility, permitted authority, and unfinished-work ownership.
ObservationTenant mappings
Match this description to the deployed or proposed boundary being examined.
DependencyDownstream audit records
Establish permitted access, provenance, and which task conditions it represents.
Illustrative preparation record. Availability, revision, and handling need confirmation.

Start with identity claims, delegation chains, tenant mappings and downstream audit records. Identify the owner, revision and operating context of each source. Sanitised examples may support initial design, but differences from actual conditions should remain explicit. Where direct access is unsuitable, a customer-controlled evidence or execution route may be considered, with agreed handling and retention.

The scope also needs the integration owner, agreed expectations for a representative interaction case, and the authority to inspect the relevant boundary. Specify what evidence would distinguish the failure in which the originating user’s restrictions disappear when a receiving agent uses its own identity from acceptable behaviour. If stakeholders disagree about intended behaviour, resolve the interpretation before classifying the observed difference as a defect.

How the work proceeds

Carry original requester through to an accountable finding

From the scoped material to a decision record

  1. Establish conditionsIdentity claims

    Agree the task meaning at the sending boundary.

  2. Examine the relationshipDelegation chain

    Apply the scoped check to executing resource.

  3. Retain the findingCross-agent identity propagation design

    Record the evidence, open dependencies, and the owner’s next decision.

Proposed sequence; resolve interpretation or access gaps before relying on the next step.

Fix the interaction contract and versions

Assemble identity claims, delegation chains, tenant mappings and downstream audit records with identity architects and multi-agent platform engineers. Identify the participating implementations, interface revisions, authority assumptions and intended business result. Prepare messages and task-state examples from both sides, including an interrupted exchange and a disputed or incomplete outcome. The preparation output is a paired contract fixture showing what each participant expects and which differences would prevent the workflow from completing correctly.

Run and compare both sides of the exchange

Inspect transformations through gateways and vendor interfaces. Test absent or inconsistent tenant context, onward delegation and attribution of final actions. Preserve the chain in authorised evidence without unnecessarily copying personal data into every message.

Choose the contract or integration change

Summarise the comparison in a cross-agent identity propagation design with context-loss tests. Classify each mismatch as interface validation, business meaning, identity, task state or operating behaviour. Decide whether to change a participant, add an explicit adapter rule, narrow supported combinations or defer the connection. Validate the affected pair again and preserve limitations that translation cannot resolve, especially around cancellation, authority and partial completion.

Indicative artefact

Make the cross-agent identity propagation design usable by its owner

Cross-agent identity propagation design

Illustrative working format

Annotated fieldCross-agent identity propagation design
Identify the assessed workflow, revision, and decision boundary.
Annotated fieldContext-loss tests
Link supporting and contrary observations to inspectable evidence.
Annotated fieldDelegation chain evidence
Link observations and counterevidence to the case, configuration, and conclusion limit.
Illustrative artefact structure, not a completed engagement or an observed result.

A useful decision artefact is a cross-agent identity propagation design with context-loss tests. Supporting material may include selected cases, configuration or process records, evidence references, a disagreement log and prioritised actions. Retain the case selection rationale and material disagreements alongside the result; otherwise the result may be mistaken for complete coverage.

Illustrative scenario

Examine executing resource through a constructed exception

A constructed case and its decision paths

Illustrative scenario

  1. SituationOriginal requester

    A receiving agent logs itself but loses the original requester's tenant context.

  2. Question to examineDelegation chain

    Compare request, delegation, and execution records across both agents.

  3. Conditional next actionExecuting resource

    Repair lost tenant or requester context before relying on the action trail.

Fictional example. No executed test, customer engagement, or measured outcome is implied.

Consider a fictional situation: an internal coordinator delegates a customer-specific task to a service agent that lacks the originating tenant scope. The scenario is illustrative, with no client engagement, executed test or measured improvement implied.

For the customer-specific task, the service agent should know which tenant and resource scope apply. Its own broader service identity must not erase those restrictions. The final system action should remain attributable to the original mandate and executing agent.

Scope and next action

Keep the conclusion within named implementations and revisions

Confirm fit before the next commitment

Included boundaryOriginal requester
This review is limited to named implementations and revisions.
PrerequisiteIdentity claims
The relevant owner must confirm access and the intended operating conditions.
Claim limitCross-agent identity propagation design
Untested peers require their own compatibility evidence.
Bring the triggering change and existing evidence; resolve the dependency that could alter the decision.

Compatibility is assessed for named implementations, versions, features and workflows. It does not establish universal conformance, vendor endorsement or interoperability with untested peers. Any engagement depends on an agreed scope, qualified team, authorised access and confirmed availability. Bring the affected workflow, its current configuration or process, the triggering change and the evidence already available. The immediate scope question is prompted by the situation in which a task crosses teams, gateways or vendor systems; confirm which missing observation would change the owner’s next action.

Ways to engage

Related engagement scopes

AI Agent Protocol Interoperability Lab

Find where connected agents disagree. Exercise message contracts, identity propagation and failure recovery across your selected integrations.

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A little more clarity

Questions to consider.

Start with the questions that shape a better decision.

Should a receiving agent reuse the originating user's credentials?

Not by default. Preserve verified origin and delegation context through an appropriate identity design. Reusing credentials can blur authority and attribution; each receiving boundary should validate the claims it relies on.

Which claims preserve the originating tenant and mandate?

Start with identity claims, delegation chains, tenant mappings and downstream audit records. Record their revision, owner and relationship to the intended workflow. Missing context should be identified before interpreting outcomes; a sanitised fixture is useful only when its relevant differences from the operating case are understood.

How should identity transformations be tested across peers?

Trace who requested, delegated, executed and authorised each action across the handoff. Compare both participants' accepted inputs, task states and results under a named interface revision. Include interrupted or delayed interactions. Parser acceptance should not be treated as agreement about business meaning, authority or completion.

What belongs in a cross-agent attribution map?

The proposed output is a cross-agent identity propagation design with context-loss tests. Include the selected conditions, supporting observations, unresolved differences and next decision. A reviewer should be able to follow each important conclusion back to its evidence and understand the limits without depending on an undocumented explanation from the author.

When should credentials not be forwarded?

Avoid forwarding credentials when doing so would blur authority, expose unnecessary access or bypass a receiving boundary's verification. Preserve validated actor and mandate context through a deliberate identity design instead.

What if existing evidence already answers the question?

Review its scope, provenance and configuration before proposing new work. Existing work from identity architects and multi-agent platform engineers may already be sufficient. In that case, capture the decision, unresolved limitations and the change that would require another review. Additional assessment should address a real gap.

What would make the findings inconclusive?

Missing identity claims, delegation chains, tenant mappings and downstream audit records can prevent a reliable interpretation, depending on the case. Record the specific missing observation and its implication. The owner can supply evidence, narrow the claim or defer the dependent decision; an incomplete case should not silently be counted as a pass.

Start with the decision you need to make.

Tell us about the agent workflow you want reviewed, and where you need greater clarity. Scope and availability are confirmed together.

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Connected disciplines

Agent communication privacy

Limit information exchanged between cooperating agents. The review connects message payloads, data classifications, purpose statements and retention settings to a bounded review of agent interaction contracts, giving the integration owner a clearer basis for the next action.

Protocol conformance testing

Check implementation behaviour against a named protocol revision. The review connects normative requirements, implementation settings, test fixtures and claimed feature support to a bounded review of agent interaction contracts, giving the integration owner a clearer basis for the next action.

Agent discovery security

Protect the process by which agents discover peers and tools. The review connects registration rules, metadata signatures, endpoint validation and cache policy to a bounded review of agent interaction contracts, giving the integration owner a clearer basis for the next action.