Added tools on the second call to Claude for avoiding error 400.

[hippolyteleveque]

Motivation and Context

Requests that include tool_result must define the corresponding tools.

How Has This Been Tested?

Tested with the quickstart code.

Breaking Changes

Types of changes

• [x ] Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)
• [ x] Documentation update

Checklist

• [ x] I have read the MCP Documentation
• [ x] My code follows the repository's style guidelines
• [ x] New and existing tests pass locally
• [ x] I have added appropriate error handling
• [ x] I have added or updated documentation as needed

Additional context

The proposed fix avoid the following error when running the code without it:

[dsp-ant]

Thank you!