VS code with Atlassian MCP Server - error creating issue with custom field

[Queenie Ng]

I am new to Agent + MCP, and was stuck in asking VS copilot Agent to create a Jira Test Issue Type with this error message:

 "message": "Failed to create issue: Bad Request. {\"errorMessages\":[],\"errors\":{\"customfield_12345\":\"must NOT have additional properties\"}}"

I asked the Agent, I google and search the jira api https://developer.atlassian.com/server/jira/platform/jira-rest-api-examples/

I tried lots of different input format for the custom field (Select list single option) but all of them fails - 

e.g.

 "customFields": {

    "customfield_12345": {

      "value": "my value"

    }

  }

or

"customfield_12345": { "value": "red" }

or

"customfield_12345": { "id": "11223" }

or

"customfield_12345": {

    "id": "11223",

    "value": "my value"

  }

Wondering if anyone has same issue and if it was resolved, how?  Or it's just a limitation of beta?

Thanks alot!

[John Funk]

Hi Queenie - Welcome to the Atlassian Community!

You will need to be a Jira Admin to create new Work Types. 

[Queenie Ng]

Hello!

Sorry about the confusion - to clarify, I am not creating a new Work Type.  Test work type already exists in our Project.  

What I wanted to do is using the Agent to create an Issue (type = Test) and relate it to another existing issue (type = Story) using "relates to" or "tests"

However creating test issue a certain custom field is mandatory (customfield_12345) in our project workflow.  I am struggling to find the right format to pass the customfield value.  

Hope it clarifies the problem I'm having

[John Funk]

Yes, that is helpful clarification. Can you provide the exact scenario/use case (step-by-step is best) and where the current process is breaking down? 

[Queenie Ng]

I tried again seems like Atlassian resolved the custom field issue already.  Test created, now trying to do the link..thanks for helping!