Prerequisites

• I have searched the existing issues to make sure this bug has not already been reported.
• I have checked the README for relevant information.

Bug Description

Pydantic 2.12.0 was released today and mcp-atlassian fails to run when used with it.

Steps to Reproduce

1. Run using uvx mcp-atlassian so that newest dependencies are used.

Expected Behavior

It should run and print log message.

Actual Behavior

It fails to run with:

TypeError: cannot specify both default and default_factory

Attempted some initial code fixes but I think FastMCP version will also likely need updating to newer as well.

mcp-atlassian Version

main branch and released pypi version

Installation Method

From PyPI (pip install mcp-atlassian / uv add mcp-atlassian)

Operating System

Linux (Specify distribution below if relevant)

Python Version

python-3.12

Atlassian Instance Type

Jira Server / Data Center

Client Application

gemini-cli

Additional Context

No response