Loading ToolBench
AI agent-driven component library with MCP server for rendering, updating, and discovering UI components
GenicUI defines 4 tools with schemas and descriptions, but quality is inconsistent. find_ui_component and subscribe_to_events have solid parameter descriptions and constraints (minLength, maxLength, enums). However, render_component and update_component lack clarity on output schemas, no documented return types visible. Descriptions are adequate (50-150 chars) but generic; they don't explain WHEN to use each tool or dependencies between them (e.g., render_component must be called before update_component). Parameter descriptions are present but sparse, 'Component props' and 'Transition animation config' are vague. No error handling guidance; no recovery paths documented. Tool composition is weak: render_component and update_component operate on the same resource but lack clear chaining semantics. No idempotency guarantees stated despite idempotencyKey parameter. Output schemas are not documented, LLMs cannot plan downstream calls.
Search the component catalog and return top-K matches. Use this to discover available UI components before rendering them.
Render a UI component on the connected client. Returns a componentId for subsequent updates and event subscriptions.
Subscribe to component events (e.g., user interactions, state changes). Returns a subscription ID for managing the subscription.
Update a mounted component's props using JSON-Patch (RFC 6902) or shallow merge.
Output schemas not documented. render_component and update_component lack return type definitions. LLMs cannot infer what fields to expect (e.g., componentId, status, error) or plan downstream tool calls.
Parameter descriptions are vague. 'Component props' (render_component) and 'Transition animation config' lack detail on structure, valid keys, or constraints. LLMs cannot reason about what to pass.
No error handling guidance. Tools do not document failure modes, recovery paths, or actionable error messages. An LLM receiving a 'render failed' response has no next step.
Tool composition unclear. render_component and update_component operate on the same resource but lack documented dependencies or sequencing rules. No guidance on idempotency despite idempotencyKey parameter.
| Scored | Grade | Overall | Spec posture | Rubric |
|---|---|---|---|---|
| 2026-09-23 | D | 52 | 2026-07-28+ | v2 |
No pagination or result limits documented. find_ui_component accepts topK up to 100 but does not document what happens if results exceed context window or how to iterate through large catalogs.