Loading ToolBench
Hot-reloading Alpine.js environment for local file parsing.
Two tools are explicitly defined in src/index.ts with proper JSON Schema input parameters. However, there are significant gaps in descriptions, parameter documentation, and output schema documentation. Tool names are action-verb-based (render_, mount_), which is good. Descriptions exist but are generic and lack LLM-actionable context. Parameter descriptions are minimal. Output schemas are not documented anywhere in the codebase. Error handling exists but lacks recovery guidance. The server implements custom browser UI rendering and file mounting, a narrow, specialized use case, but the tool interface doesn't guide the LLM on when to use each tool or what the typical workflow should be.
Mount a local file into the web server root for browser access.
Render or update an Alpine.js interactive UI in the browser.
Output schemas are not documented. Tools return content arrays with type and text fields, but the LLM has no schema to understand the structure. This forces the LLM to parse unstructured output.
render_interactive_ui description (61 chars) is too generic. It says WHAT (render UI) but not WHEN to use it or what the user needs to know about the interactive environment. Missing: prerequisites, expected HTML structure, available JavaScript APIs, typical workflow.
mount_file description (71 chars) is incomplete. It says files are mounted 'into the web server root' but does not explain why this is needed, when to call it relative to render_interactive_ui, or what path format it returns. Missing dependency hint: 'Call this to make local files accessible to the rendered UI.'
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | D | 57 | 2026-07-28+ | v2 |
Parameter 'required_libs' has enum values [excel, pdf, ocr] but the description does not explain what each library does or when to include them. LLM cannot determine whether to pass ['pdf', 'xlsx'] or just ['pdf']. Mapping to actual library names (pdf.js, xlsx, tesseract.js) is mentioned but buried in the description.
No error recovery guidance. handleMountFile catches errors and returns isError: true with the error message, but does not tell the LLM what to do next. E.g., 'File not found at /path/to/file, verify the path is absolute and readable.'
No tool for discovering available UI components or examples. The LLM has no way to ask 'what Alpine.js components are available?' or 'show me an example HTML template'. This forces the LLM to guess the expected HTML structure.