Analysis finds Chrome and Playwright MCP tool descriptions lack key usage and return details

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An analysis of two browser automation tools, Chrome DevTools MCP and Playwright MCP, found their tool descriptions scored an average of 45.1 and 41.9 out of 100. The evaluation was conducted in October 2026 using a static linter called Forecall, which the author built. The assessment revealed that most tools in both servers do not specify when to use them or what they return. The analysis suggests these omissions could hinder AI agents that rely solely on descriptions to select and use the appropriate tools.

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