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Browser tool bug returns '[object Promise]' due to sync/async mismatch

By PulseAugur Editorial · [1 sources] ·

A bug in a browser automation tool caused it to return the literal string "[object Promise]" instead of actual webpage content. This occurred because the tool used AppleScript to execute JavaScript, and the JavaScript code contained an `await` call within an asynchronous function. AppleScript, being synchronous, could not handle the asynchronous operation and instead stringified the pending Promise object, returning it as the result. This silent failure went unnoticed by the AI agent using the tool, leading to incorrect conclusions and propagating errors. AI

IMPACT Silent failures in AI tools can lead to incorrect conclusions and propagate errors, highlighting the need for robust error handling and understanding of underlying system behaviors.

RANK_REASON The cluster describes a bug in a specific software tool and its technical cause.

Read on dev.to — MCP tag →

AI-generated summary · Google Gemini · from 1 sources. How we write summaries →

Browser tool bug returns '[object Promise]' due to sync/async mismatch

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The cluster describes a bug in a specific software tool and its technical cause.
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Only one publisher covered this so far. Single-source stories can still rank when the publisher is high-authority, but they lack cross-source corroboration.
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product, other
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High
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Story freshness
109 days old
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COVERAGE [1]

  1. dev.to — MCP tag TIER_1 English(EN) · אחיה כהן ·

    My browser tool returned "[object Promise]" as a webpage. One grep later, 10 more tools had the same bug.

    <p>The bug report was three words long: "navigate_and_read returns junk."</p> <p><code>safari_navigate_and_read</code> is supposed to navigate Safari to a URL and hand the page's text back to the AI agent driving it. So I called it. It didn't throw. It didn't time out. It returne…

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