fix: removed code that caused claude send all mcp tool args as required

[yarin-tradezbird]

Summary

Problem

Claude models were incorrectly marking all optional MCP tool parameters as required,
causing validation errors when Claude generated invalid default values in the args

Solution

Removed the faulty auto-requirement logic in format_tools_for_model() function in
agno/utils/models/claude.py that was making all non-nullable parameters required when no
explicit required parameters existed.

Changes

• File: agno/utils/models/claude.py
• Lines: 310-316
• Type: Removed 7 lines of buggy logic

Testing

• Verified Claude agents now work correctly with MCP tools
• Tool calls no longer include invalid default parameters
• Schema now respects original tool author's intent for optional vs required parameters

Type of change

• [V] Bug fix
• New feature
• Breaking change
• Improvement
• Model update
• Other:

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Checklist

• [V] Code complies with style guidelines
• [V] Ran format/validation scripts (./scripts/format.sh and ./scripts/validate.sh)
• Self-review completed
• Documentation updated (comments, docstrings)
• Examples and guides: Relevant cookbook examples have been included or updated (if applicable)
• Tested in clean environment
• Tests added/updated (if applicable)

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