Fix execute_playwright_code snapshot tip#125
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The tool returned executed-code output verbatim and unbounded, so a single whole-page read (innerText/ariaSnapshot on body) could dump tens to hundreds of KB into the model context. The code param also recommended page._snapshotForAI(), which is a large full-page dump and is not reliably available in the execution runtime. - Cap each returned field at 25k chars with a truncation marker that nudges toward targeted selectors. Small structured results keep their shape. - Replace the _snapshotForAI() tip with guidance to scope reads to a selector or region. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
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Replace the single all-or-nothing snapshot tip with a broad-to-narrow workflow: orient cheaply (title + heading outline, or a landmark map of region/label/control-count), then scope ariaSnapshot to one region, then extract with a targeted locator. Explicitly warns off whole-page innerText/ ariaSnapshot on body. Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
dprevoznik
changed the title
Trim the recon-funnel walkthrough back to a single Tip: line matching the original description's shape — prefer targeted selectors and scope reads to a region instead of dumping the whole page.
dprevoznik
changed the title
Revert the per-field output truncation. The only change vs main is the code param tip: prefer a targeted selector and scope reads to a region instead of the removed _snapshotForAI() whole-page snapshot.
dprevoznik
changed the title
masnwilliams
marked this pull request as ready for review
July 21, 2026 17:41
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Summary
The
codeparam tip recommendedawait page._snapshotForAI()for "a comprehensive page state snapshot." That steers agents toward a whole-page dump — its size scales with page complexity, and it's a Playwright internal that isn't reliably exposed in the execution runtime, so agents call it, it errors, and they fall back to an even biggerbody.innerText(). This is a big context-window driver onexecute_playwright_code.Swapped it for a one-line tip in the same shape:
One-line change to the tool description; no behavior change to execution or output. Typechecks clean.
🤖 Generated with Claude Code
Note
Low Risk
Copy-only change to an MCP tool schema description; no runtime or security impact.
Overview
Documentation-only change to the MCP
execute_playwright_codetool: thecodeparameter description no longer suggestspage._snapshotForAI()for a full-page snapshot.The tip now tells agents to return only what they need—e.g.
page.locator(SELECTOR).innerText()or scopedpage.locator("main").ariaSnapshot()—instead of dumping the whole page. No change to Playwright execution, handlers, or tool behavior.Reviewed by Cursor Bugbot for commit e72d06f. Bugbot is set up for automated code reviews on this repo. Configure here.