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fix: Make fill_form more appealing when filling forms with checkboxes #1971

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fix: Make fill_form more appealing when filling forms with checkboxes #1971

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fix: Make agents choose fill_form more frequently when filling forms …
Apr 28, 2026
053365a
Modify fill and fill_form tools to handle checkboxes and radio buttons.
Apr 30, 2026
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4 changes: 2 additions & 2 deletions docs/tool-reference.md
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
<!-- AUTO GENERATED DO NOT EDIT - run 'npm run gen' to update-->

# Chrome DevTools MCP Tool Reference (~7005 cl100k_base tokens)
# Chrome DevTools MCP Tool Reference (~7014 cl100k_base tokens)

- **[Input automation](#input-automation)** (9 tools)
- [`click`](#click)
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### `fill_form`

**Description:** [`Fill`](#fill) out multiple form elements at once
**Description:** [`Fill`](#fill) out multiple form elements at once. To set checkboxes [`fill`](#fill) them with 'true'

**Parameters:**

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2 changes: 1 addition & 1 deletion src/tools/input.ts
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Expand Up @@ -313,7 +313,7 @@ export const drag = definePageTool({

export const fillForm = definePageTool({
name: 'fill_form',
description: `Fill out multiple form elements at once`,
description: `Fill out multiple form elements at once. To set checkboxes fill them with 'true'`,
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@OrKoN OrKoN Apr 28, 2026

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let's add a test to tests/tools/input.test.ts that tests checkboxes and verify that it actually accepts a string true and false

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@zyzyzyryxy zyzyzyryxy Apr 30, 2026

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Good catch, I misread some eval results thinking it already works this way. Pushed an update to make fill and fill_form handle those, together with tests.

annotations: {
category: ToolCategory.INPUT,
readOnlyHint: false,
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