Bug: Tool Icon Source accepts invalid values and lacks default fallback icon

[sahil2448]

Describe the bug

In the Tools screen, the Tool Icon Source field accepts any random string (non-URL) and still allows saving the tool.

This causes broken or missing icons in the Tools list/card views.

Also, when Tool Icon Source is left empty or invalid, there is no consistent default icon fallback shown for the tool.

To Reproduce

1. Go to Tools.
2. Click Create.
3. Fill the required fields:
   • Tool Name
   • Tool Description
4. In Tool Icon Source, enter a non-URL value, for example: abc123.
5. Click Add/Save.
6. Observe that the tool is saved successfully.
7. Return to the Tools list/card view and observe that the icon rendering is broken or empty.

Expected behavior

• Tool Icon Source should be optional.
• If empty: tool save should succeed and the UI should show a default fallback icon.
• If provided: the value should be validated as a valid http / https URL.
• If invalid: the user should see a clear validation error, and saving should be blocked until corrected.

Screenshots

Flow

N/A (UI-level Tools management issue)

Use Method

pnpm start

Flowise Version

No response

Operating System

Windows

Browser

Other

Additional context

No response

[xxiaoxiong]

This issue has been fixed in PR #6394 🎉

The PR adds:

• ✅ URL validation for Tool Icon Source field
• ✅ Error message display for invalid URLs
• ✅ Saving blocked when URL is invalid
• ✅ Empty values allowed (optional field)
• ✅ Real-time validation on input change

The fix is currently awaiting review and merge.