[BUG]: discard and extract tools fail with TypeError: {} is not iterable

[pgkaralis]

Steps to reproduce:

Run some tools that produce output (grep, read, etc)
Try to use the discard tool with any valid ID from the prunable-tools list
Get error: TypeError: {} is not iterable
Tried multiple formats:

["noise", "0"]
["0", "1", "2"]
["completion", "0"]
All return the same error. Running on Windows.

[github-actions]

This issue doesn't fully meet our contributing guidelines.

What needs to be fixed:

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[pgkaralis]

This issue doesn't fully meet our contributing guidelines.

What needs to be fixed:

• The issue contains AI-generated content in the "Steps to reproduce" section ("Error Analysis", "Root Cause Hypothesis", code pattern examples). Please replace this with your actual reproduction steps and what you observed. Long AI-generated analysis is not acceptable in issue reports.
• Please provide your actual steps to reproduce the bug in a simple numbered list, along with the exact error message you received.

Please edit this issue to address the above within 2 hours, or it will be automatically closed.

If you believe this was flagged incorrectly, please let a maintainer know.

adjusted

[github-actions]

Thanks for updating the issue! The content now looks good - clear reproduction steps, the actual error message, and relevant context. The needs:compliance label has been removed.