Uploadkit

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

With no annotations provided, the description carries full burden and does so effectively. It explicitly states 'Read-only, no side effects, idempotent' which covers safety and behavioral traits. It also describes the return format in detail, though it doesn't mention rate limits, authentication needs, or pagination behavior.

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

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

Perfectly structured with three distinct paragraphs: purpose statement, usage guidelines, and behavioral/return details. Every sentence adds value with zero redundancy. The description is appropriately sized and front-loaded with the core functionality.

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

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

For a read-only listing tool with one optional parameter and no output schema, the description is complete. It covers purpose, usage context, return format, and behavioral guarantees. Given the tool's simplicity and the absence of annotations/output schema, the description provides all necessary context for effective agent use.

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

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

Schema description coverage is 100%, so the schema already fully documents the single optional 'category' parameter with its enum values and descriptions. The description doesn't add any parameter-specific information beyond what's in the schema, but with complete schema coverage, the baseline of 3 is appropriate.

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

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

The description clearly states the specific action ('List every React upload component') and resource ('shipped by @uploadkitdev/react'), including the exact data fields returned. It distinguishes this tool from siblings like 'get_component' (singular) and 'search_components' (filtered search) by emphasizing comprehensive listing with optional category filtering.

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

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

Explicitly states 'When to use: before recommending or scaffolding any UploadKit component, to confirm the exact name exists and to pick the right variant for the user's context.' It provides concrete scenarios (e.g., 'browse all "dropzone" variants when the user wants a drag-and-drop area'), giving clear guidance on when this tool is appropriate versus alternatives.

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