Bring tooling to the next level.

You can now define what tools you want to use at an Alter Action Level

AuthorAuthor

Samuel ROY & Olivier Legris
October 03, 2025

Hey everyone,

We're rolling out a feature that gives you surgical precision over how Alter executes your workflows: Action-Level Tool Customization.

Now you can decide exactly which tools are available for each specific action, perfectly balanced as all things should be.

What's New?

Open any Alter Action editor, and you'll find a new Action Specific Tooling section under Advanced settings.

Here, you can define tools only for that action. Simple as that. Other tools will be ignored.

Why This Matters

1. Speed
Instead of loading every tool you have, Alter only ingests what's needed. Faster execution, every time.

2. Precision
Define exactly which tools should be available. Create a calendar action? Only enable Apple Calendar and Google Calendar. No distractions, no mistakes.

3. Context-Aware Automation
Set system instructions like "use Apple Calendar for personal events, Google Calendar for work." Alter will automatically route requests to the right calendar based on context, no manual selection needed.

4. Better Configuration
Add parameters directly in the action: email addresses, colleague names, IDs, or any other details your tools need to work perfectly.

Real-World Example

Building a calendar management action?

  1. Include only calendar tools

  2. Add system instructions: "Apple Calendar = personal, Google Calendar = work"

  3. Define work rules in your profile

  4. Done

Now when you ask Alter to schedule something, it knows exactly where it goes, personal or professional, without you specifying.

And yes it is even more powerful with the voice triggers.

The Bottom Line

More control = better results. Configure your tools at the action level, and watch your workflows become faster and more accurate.

Try it today and let us know what you build.

Cheers

Full Changelog

New Features & Enhancements

  • Browser Support: Added Wavebox to supported browsers

  • Dictation Replacements: Apply custom replacements to dictation and speech to prompt, with new replacements section in the Voice settings

  • Template System: Added {% userLanguage %} tag and `{ xxx | dominantLanguage } filter for smarter language handling

Bug Fixes & Stability

  • Conversations: Restored confirm deletion Enter key behavior

  • Tool Management: Resolved crash with ghost tools, now processing tools in chunks of three to prevent freezing

  • Editor: Prevented crash when selection ID is nil

  • Diff View: Fixed magic diff toggle switch behavior

  • Text Selection: Restored missing text selection in bubble view

  • Speaker Identification: Improved speakerkit loading reliability

  • API Layer: Isolated API on its own actor to resolve concurrency issues

  • Core Data: Prevented indexing crash

  • Audio Recording: Improved handling to avoid frame capacity crash when ending recordings

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