How to pass the epic via the jira_create_issue tool?

[ddelzell]

Epics are required for issues at my company. I'm using this jira_create_issue tool, but no matter what I do, it can't see to get the epic key in a way that allows it to create the issue.

Here is what Claude Code is trying to do...
⏺ atlassian - jira_create_issue (MCP)(project_key: "DSSO", summary: "[dotfiles] Fix README", issue_type: "Story", assignee: "ddelzell", description: "## Description\nWill fix the README file to ensure it is up-to-date and accurate.\n\n## Expected Work Product\nPR with updated README file", additional_fields: {"priority":{"name":"Major"},"epicKey":"DSSO-1"})

In the logs I get that an Epic Link is required, but I'm at a loss to how to pass that in.

                             HTTPError: Epic Link - Having                      

                             an Epic associated to the issue                    

                             is mandatory.                                      

                             Having an Epic associated to                       

                             the issue is mandatory.                            

ERROR - FastMCP.fastmcp.tools.tool_manager - Error calling tool 'create_issue': Epic Link - Having an Epic associated to the issue is mandatory.

Having an Epic associated to the issue is mandatory.

Traceback (most recent call last):

  File "/app/.venv/lib/python3.10/site-packages/fastmcp/tools/tool_manager.py", line 120, in call_tool

    return await tool.run(arguments)

  File "/app/.venv/lib/python3.10/site-packages/fastmcp/tools/tool.py", line 144, in run

    result = await result

  File "/app/.venv/lib/python3.10/site-packages/mcp_atlassian/utils/decorators.py", line 147, in wrapper

    return await func(ctx, *args, **kwargs)

  File "/app/.venv/lib/python3.10/site-packages/mcp_atlassian/servers/jira.py", line 705, in create_issue

    issue = jira.create_issue(

  File "/app/.venv/lib/python3.10/site-packages/mcp_atlassian/jira/issues.py", line 591, in create_issue

    response = self.jira.create_issue(fields=fields)

  File "/app/.venv/lib/python3.10/site-packages/atlassian/jira.py", line 1729, in create_issue

    return self.post(url, params=params, data=data)

  File "/app/.venv/lib/python3.10/site-packages/atlassian/rest_client.py", line 707, in post

    response = self.request(

  File "/app/.venv/lib/python3.10/site-packages/atlassian/rest_client.py", line 439, in request

    self.raise_for_status(response)

  File "/app/.venv/lib/python3.10/site-packages/atlassian/rest_client.py", line 988, in raise_for_status

    raise HTTPError(error_msg, response=response)

requests.exceptions.HTTPError: Epic Link - Having an Epic associated to the issue is mandatory.

Having an Epic associated to the issue is mandatory.

{"jsonrpc":"2.0","id":8,"result":{"content":[{"type":"text","text":"Error calling tool 'create_issue'"}],"isError":true}}