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fix: Foundry Agents without description in Handoff

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Foundry Agents without a description set will return an empty string (rather than null) for the description. This was breaking the fallback logic for `handoffReason`.
This commit is contained in:
Jacob Alber
2026-04-16 11:43:50 -04:00
Unverified
parent c14beedb3a
commit c672627aaf
1 changed files with 7 additions and 3 deletions
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dotnet/src/Microsoft.Agents.AI.Workflows/HandoffWorkflowBuilder.cs
+7 -3
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@@ -219,13 +219,17 @@ public class HandoffWorkflowBuilderCore<TBuilder> where TBuilder : HandoffWorkfl
if (string.IsNullOrWhiteSpace(handoffReason))
{
handoffReason = to.Description ?? to.Name ?? (to as ChatClientAgent)?.Instructions;
handoffReason = (string.IsNullOrWhiteSpace(to.Description) ? null : to.Description)
?? (string.IsNullOrWhiteSpace(to.Name) ? null : $"handoff to {to.Name}")
?? to.GetService<ChatClientAgent>()?.Instructions;
if (string.IsNullOrWhiteSpace(handoffReason))
{
Throw.ArgumentException(
nameof(to),
$"The provided target agent '{to.Name ?? to.Id}' has no description, name, or instructions, and no handoff description has been provided. " +
"At least one of these is required to register a handoff so that the appropriate target agent can be chosen.");
$"The provided target agent '{(string.IsNullOrWhiteSpace(to.Name) ? to.Id : to.Name)}' has no description, name, or instructions, and no " +
"handoff description has been provided. At least one of these is required to register a handoff so that the appropriate target agent can " +
"be chosen.");
}
}