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for MCP' accurately and concisely reflects the extension's functionality.",{"category":39,"check":40,"severity":23,"summary":41},"Invocation","Scoped tools","All exposed tools are narrow verb-noun specialists (e.g., browser_navigate, browser_click), making them easy for the agent to select and reducing attack surface.",{"category":43,"check":44,"severity":23,"summary":45},"Documentation","Configuration & parameter reference","The README provides detailed descriptions of all tools and their parameters, including optional ones, and the schema definitions in the source code further solidify this.",{"category":32,"check":47,"severity":23,"summary":48},"Tool naming","Tool names like 'browser_navigate', 'browser_click', and 'browser_snapshot' are descriptive and follow a clear verb-noun pattern within the browser domain.",{"category":32,"check":50,"severity":23,"summary":51},"Minimal I/O surface","Tool parameters are well-defined and specific to the task (e.g., `element` and `ref` for clicks), and responses are focused on the promised payload.",{"category":53,"check":54,"severity":23,"summary":55},"License","License usability","The extension is licensed under Apache-2.0, a permissive open-source license, and this is clearly declared in the LICENSE file and package.json.",{"category":57,"check":58,"severity":23,"summary":59},"Maintenance","Commit recency","The last commit was on April 23, 2026, well within the 3-month window, indicating active maintenance.",{"category":57,"check":61,"severity":23,"summary":62},"Dependency Management","The project uses npm and pins dependencies via package.json and lockfiles, with Playwright itself pinned to a specific version.",{"category":64,"check":65,"severity":23,"summary":66},"Security","Secret Management","The extension does not appear to handle or echo secrets; its primary function is browser interaction, and no secrets are managed in the code.",{"category":64,"check":68,"severity":23,"summary":69},"Injection","The extension relies on Playwright's sandboxed execution and does not appear to load or execute arbitrary third-party data as instructions.",{"category":64,"check":71,"severity":23,"summary":72},"Transitive Supply-Chain Grenades","The extension bundles all its dependencies and does not fetch external code or data at runtime for execution.",{"category":64,"check":74,"severity":23,"summary":75},"Sandbox Isolation","Playwright operates within its own sandboxed environment, and the MCP server's tools are designed to interact with the browser context, not the host filesystem outside of its intended scope.",{"category":64,"check":77,"severity":23,"summary":78},"Sandbox escape primitives","There are no apparent detached-process spawns or deny-retry loops in the provided code snippets.",{"category":64,"check":80,"severity":23,"summary":81},"Data Exfiltration","The extension's tools interact with web pages but do not have explicit instructions to read or submit confidential data to third parties.",{"category":64,"check":83,"severity":23,"summary":84},"Hidden Text Tricks","The bundled content and descriptions appear free of hidden-steering tricks, relying on standard markdown and code comments.",{"category":86,"check":87,"severity":23,"summary":88},"Hooks","Opaque code execution","The bundled scripts are written in TypeScript and compiled to JavaScript, with no signs of obfuscation, base64 payloads, or runtime fetched code.",{"category":90,"check":91,"severity":23,"summary":92},"Portability","Structural Assumption","The extension operates within the browser context and does not make assumptions about the user's local project file structure beyond standard browser interactions.",{"category":94,"check":95,"severity":96,"summary":97},"Trust","Issues Attention","info","There is 1 open issue and 0 closed issues in the last 90 days, indicating low recent activity on issues, but the low volume suggests it might not be a concern.",{"category":99,"check":100,"severity":23,"summary":101},"Versioning","Release Management","The project declares a version (0.0.30) in its package.json and uses npm for publishing, providing a clear version signal.",{"category":103,"check":104,"severity":23,"summary":105},"Execution","Validation","The code extensively uses Zod for input validation across all tools, ensuring parameters are correctly shaped and constrained.",{"category":64,"check":107,"severity":23,"summary":108},"Unguarded Destructive Operations","Destructive operations like clicking and typing are clearly marked as 'destructive' in their schema and are behind the MCP's consent mechanism, not a buried flag.",{"category":110,"check":111,"severity":23,"summary":112},"Errors","Error Handling","The code utilizes Zod for input validation, and internal error handling within Playwright interactions appears robust, with specific error messages for missing 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assumptions.",{"category":43,"check":129,"severity":23,"summary":130},"README","A comprehensive README exists, clearly stating the extension's purpose, features, and usage examples.",{"category":32,"check":132,"severity":23,"summary":133},"Tool surface size","The extension exposes a reasonable number of tools (around 30 grouped by functionality), which is manageable for an LLM.",{"category":39,"check":135,"severity":23,"summary":136},"Overlapping near-synonym tools","Tool names are distinct and cover specific browser actions without significant overlap or redundancy.",{"category":43,"check":138,"severity":23,"summary":139},"Phantom features","All features described in the README and tool descriptions have corresponding implementations in the source code.",{"category":141,"check":142,"severity":23,"summary":143},"Install","Installation instruction","The README provides clear installation instructions using npm and includes copy-pasteable examples for deployment and usage with various clients.",{"category":110,"check":145,"severity":23,"summary":146},"Actionable error messages","Errors during tool execution, such as missing elements or invalid inputs, provide specific messages and context that the agent can act upon.",{"category":103,"check":148,"severity":23,"summary":149},"Pinned dependencies","Dependencies in package.json appear to be pinned, and the use of `npm ci` further ensures reproducible builds.",{"category":32,"check":151,"severity":23,"summary":152},"Dry-run preview","Destructive operations like clicking and typing do not have an explicit dry-run mode, but the MCP framework and tool descriptions inherently provide a preview of the action before execution.",{"category":154,"check":155,"severity":23,"summary":156},"Protocol","Idempotent retry & timeouts","The MCP framework and Playwright interactions provide timeouts, and while mutations are not explicitly documented as idempotent, the framework supports 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rather than a buried flag.",{"category":158,"check":174,"severity":23,"summary":175},"Imperative phrasing","Tool descriptions are factual and avoid imperative phrasing directed at the model, focusing on describing the tool's function.",{"category":158,"check":177,"severity":23,"summary":178},"Output schema","Tools that return structured data, like screenshots or console logs, declare output schemas or provide documented outputs.",{"category":154,"check":180,"severity":23,"summary":181},"Stdout discipline","The server strictly adheres to writing only JSON-RPC payloads to stdout, with diagnostics directed to stderr.",{"category":64,"check":183,"severity":23,"summary":184},"Transport choice","The extension is designed for local use via stdio, aligning with security best practices for process isolation.",{"category":64,"check":186,"severity":116,"summary":187},"Auth","The extension uses stdio transport for local execution, so remote HTTP authentication mechanisms are not applicable.",{"category":64,"check":189,"severity":116,"summary":190},"Audience claim","The extension uses stdio transport for local execution, so JWT audience validation is not applicable.",{"category":64,"check":192,"severity":116,"summary":193},"Rebinding defense","The extension is designed for local execution via stdio and does not expose a local Streamable HTTP server, making DNS rebinding defenses not applicable.",{"category":64,"check":195,"severity":23,"summary":196},"Granular Control","The tools are categorized by capability, allowing for granular control over which functionalities are exposed, rather than a monolithic binary.",{"category":154,"check":198,"severity":23,"summary":199},"Lifecycle handlers","The server implementation includes core lifecycle handlers like connection management and seems to handle shutdowns gracefully.",{"category":154,"check":201,"severity":23,"summary":202},"Validation errors","Input validation uses Zod, and invalid inputs are expected to return 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