.NET: Pass AdditionalProperties from parent to child when exposing an agent as a FunctionTool#3219
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westey-m merged 5 commits intomicrosoft:mainfrom Jan 20, 2026
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Pull request overview
This PR enables the propagation of AdditionalProperties from a parent agent to a child agent when the child is exposed as a FunctionTool. This allows custom properties set on the parent agent's run context to flow through to nested agent invocations.
Changes:
- Modified
AgentExtensions.AsAIFunctionto extract AdditionalProperties from the parent agent's FunctionInvokingChatClient context and pass them to the child agent via AgentRunOptions - Added a comprehensive unit test to verify that AdditionalProperties are correctly passed from parent to child agent
- Added a helper method in the test class to use reflection for setting the FunctionInvokingChatClient's CurrentContext for testing purposes
Reviewed changes
Copilot reviewed 2 out of 2 changed files in this pull request and generated 2 comments.
| File | Description |
|---|---|
| dotnet/src/Microsoft.Agents.AI/AgentExtensions.cs | Modified InvokeAgentAsync to propagate AdditionalProperties from FunctionInvokingChatClient.CurrentContext to child agent options |
| dotnet/tests/Microsoft.Agents.AI.UnitTests/AgentExtensionsTests.cs | Added test for AdditionalProperties propagation and helper method for setting CurrentContext via reflection; enhanced TestAgent to track received AgentRunOptions |
dotnet/tests/Microsoft.Agents.AI.UnitTests/AgentExtensionsTests.cs
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Co-authored-by: Copilot <175728472+Copilot@users.noreply.github.com>
SergeyMenshykh
approved these changes
Jan 14, 2026
|
I tried this @westey-m and the E2E Scenario is working perfectly. Please try to merge it ASAP :) |
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Thanks for verifying @moetarhinikaseya. I'm waiting to get some further input from key individuals, which should happen tomorrow. |
markwallace-microsoft
approved these changes
Jan 19, 2026
rogerbarreto
approved these changes
Jan 20, 2026
|
@westey-m Still on track for merging this today ? |
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Motivation and Context
#3127
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