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list_components

Retrieve a complete list of UI components with details, filtered by category or tier. Start here to understand what components are available.

Instructions

List all components in the Web UI Component Specification. Returns name, id, category, tier, and one-line summary for each. Always call this first in a new session to establish what exists. Optionally filter by category or tier.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
categoryNoFilter by functional category (partial match, case-insensitive). Options: 'Content & Typography', 'Layout & Structure', 'Identity & Status Indicators', 'Actions & Navigation Primitives', 'Form Inputs & Controls', 'Feedback & Communication', 'Overlays & Floating Elements', 'Adaptive Elements', 'Navigation & Wayfinding', 'Data Display & Visualization'
tierNoFilter by complexity tier: 'Basic', 'Intermediate', or 'Advanced'
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations provided, so description carries full burden. It only describes return fields and filtering, but omits behavioral traits like read-only nature, performance implications, or authentication requirements.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

Three sentences, no redundancy. Front-loaded with purpose and key usage instruction, every sentence earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Covers purpose, return fields, usage order, and filtering. Lacks details on pagination or sorting, which would be useful for a listing tool, but overall adequate.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Both parameters are fully described in the input schema (100% coverage). The description adds context for always calling first but does not enhance parameter meaning beyond the schema.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool lists all components and returns specific fields (name, id, category, tier, summary). It differentiates from siblings like search_components by focusing on the full listing.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly advises to call this first in a new session, providing strong when-to-use guidance. Does not explicitly mention when not to use or compare to alternatives like get_component_spec.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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