I'm not sure I can agree to that.

Meaning

I'm hesitant about accepting your proposal.

Examples

• John: So, we're all agreed on the new strategy?
• Alice: <b>I'm not sure I can agree to that</b>. I have some concerns.
• John: What are your concerns?
• Alice: The timeline is too tight. <b>I'm not sure I can agree to that</b>.