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.NET: Expose workflows as MCP tools when hosting on Azure functions (#4768)

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* Expose workflow as MCP Tool

* Expose workflow as MCP Tool

* Cleanup

* PR feedback fixes

* update changelog to include PR numner

* Improvements to error handling.

* Adding a sample project demonstrating how to setup Agents and Workflows together.

* Ensure duplicate agent registrations are properly handled.
This commit is contained in:
Shyju Krishnankutty
2026-03-25 15:43:15 +00:00
committed by GitHub
parent a9db40886e
commit 49d69b3bf5
28 changed files with 1011 additions and 39 deletions
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dotnet/src/Microsoft.Agents.AI.Hosting.AzureFunctions/DurableAgentFunctionMetadataTransformer.cs
+22 -15
View File
@@ -6,9 +6,13 @@ using Microsoft.Extensions.Logging;
namespace Microsoft.Agents.AI.Hosting.AzureFunctions;
/// <summary>
/// Transforms function metadata by registering durable agent functions for each configured agent.
/// Transforms function metadata by registering durable agent functions for each explicitly configured agent.
/// </summary>
/// <remarks>This transformer adds both entity trigger and HTTP trigger functions for every agent registered in the application.</remarks>
/// <remarks>
/// This transformer adds entity, HTTP, and MCP tool trigger functions for agents that have
/// explicit <see cref="FunctionsAgentOptions"/>. Agents auto-registered by workflows
/// (which lack explicit options) are handled by <see cref="DurableWorkflowsFunctionMetadataTransformer"/>.
/// </remarks>
internal sealed class DurableAgentFunctionMetadataTransformer : IFunctionMetadataTransformer
{
private readonly ILogger<DurableAgentFunctionMetadataTransformer> _logger;
@@ -38,24 +42,27 @@ internal sealed class DurableAgentFunctionMetadataTransformer : IFunctionMetadat
{
string agentName = kvp.Key;
this._logger.LogRegisteringTriggerForAgent(agentName, "entity");
// Only generate triggers for agents with explicit Functions agent options.
// Agents auto-registered by workflows are handled by DurableWorkflowsFunctionMetadataTransformer.
if (!this._functionsAgentOptionsProvider.TryGet(agentName, out FunctionsAgentOptions? agentTriggerOptions))
{
continue;
}
this._logger.LogRegisteringTriggerForAgent(agentName, "entity");
original.Add(FunctionMetadataFactory.CreateEntityTrigger(agentName));
if (this._functionsAgentOptionsProvider.TryGet(agentName, out FunctionsAgentOptions? agentTriggerOptions))
if (agentTriggerOptions.HttpTrigger.IsEnabled)
{
if (agentTriggerOptions.HttpTrigger.IsEnabled)
{
this._logger.LogRegisteringTriggerForAgent(agentName, "http");
original.Add(FunctionMetadataFactory.CreateHttpTrigger(agentName, $"agents/{agentName}/run", BuiltInFunctions.RunAgentHttpFunctionEntryPoint));
}
this._logger.LogRegisteringTriggerForAgent(agentName, "http");
original.Add(FunctionMetadataFactory.CreateHttpTrigger(agentName, $"agents/{agentName}/run", BuiltInFunctions.RunAgentHttpFunctionEntryPoint));
}
if (agentTriggerOptions.McpToolTrigger.IsEnabled)
{
AIAgent agent = kvp.Value(this._serviceProvider);
this._logger.LogRegisteringTriggerForAgent(agentName, "mcpTool");
original.Add(CreateMcpToolTrigger(agentName, agent.Description));
}
if (agentTriggerOptions.McpToolTrigger.IsEnabled)
{
AIAgent agent = kvp.Value(this._serviceProvider);
this._logger.LogRegisteringTriggerForAgent(agentName, "mcpTool");
original.Add(CreateMcpToolTrigger(agentName, agent.Description));
}
}
}