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Azure OpenAI Agent ValueError
![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(236.8, 63%, 32%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EDB%3C/text%3E%3C/svg%3E)
Deepika Birthare
20
Reputation points Microsoft Employee
I have created an agent using Azure OpenAI and I am trying to use the OpenApi 3.0 specified tools with Agent. I have a service running in Azure. I want to call that service endpoint from agent. I am using Azure Managed Identity based authentication.
Earlier the implementation was working fine but suddenly it has stopped working with the same OpenAPI specs that I used earlier.
This is the error :
{"id":"call_AXWyK5ekzM66fhE9pwtdFkQ8","type":"openapi","function":{"name":"OpenAPITool_queryService","arguments":"{"question":"What is","scenario":"xyz","chat_history":[],"conversation_id":"testid"}","output":"content_type='system_error' name='ValueError' text="Encountered exception: <class 'ValueError'>.""}}
And this is the doc I followed:https://learn.microsoft.com/en-us/azure/ai-foundry/agents/how-to/tools/openapi-spec-samples?pivots=csharp
Azure AI services
{count} votes
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Deepika Birthare 20 Reputation points Microsoft Employee
2025-07-05T20:57:39.6266667+00:00 Has something changed in the OpenAPI tool used with AI Agents ?
It's failing to make the api call to the service , I am guessing the call didn't my service
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(297.6, 93%, 38%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EAP%3C/text%3E%3C/svg%3E)
Aryan Parashar 530 Reputation points Microsoft External Staff Moderator2025-07-23T13:54:58.1466667+00:00 Hi @Deepika Birthare
I followed the documentation and didn’t encounter any issues. Could you please provide more information about the error? -
Aryan Parashar 530 Reputation points Microsoft External Staff Moderator
2025-07-24T12:35:50.96+00:00 Are you still encountering the same issue? If so, could you please provide more details or any error messages you're seeing? That way, I can assist you better in resolving it.
Thank you for reaching out to the Microsoft Q&A portal!
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Deepika Birthare 20 Reputation points Microsoft Employee
2025-07-28T08:29:15.89+00:00 I have given the error in the above post
This is the only error message I am getting, I doubt that Agent is not able to call the API
{"id":"call_AXWyK5ekzM66fhE9pwtdFkQ8","type":"openapi","function":{"name":"OpenAPITool_queryService","arguments":"{"question":"What is","scenario":"xyz","chat_history":[],"conversation_id":"testid"}","output":"content_type='system_error' name='ValueError' text="Encountered exception: <class 'ValueError'>.""}}
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![](data:image/svg+xml, %3Csvg xmlns='http://www.w3.org/2000/svg' height='64' class='font-weight-bold' style='font: 600 30.11764705882353px "SegoeUI", Arial' width='64'%3E%3Ccircle fill='hsl(252.8, 87%, 34%)' cx='32' cy='32' r='32' /%3E%3Ctext x='50%25' y='55%25' dominant-baseline='middle' text-anchor='middle' fill='%23FFF' %3EJK%3C/text%3E%3C/svg%3E)
Jerome Kafrouni 0 Reputation points Microsoft Employee2025-08-27T15:03:50.5033333+00:00 @Deepika Birthare did you ever figure it out? I am running into the same issue setting up an openapi tool with only one POST endpoint, with managed identity authentication
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