list_root

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

No annotations are provided, so the description carries the full burden. It is a listing operation, which implies no side effects, but the description does not explicitly state that it does not modify anything or disclose any behavior like pagination or sorting. The added context about 'before organizing or cleaning up' is helpful but minimal, so a 3 is appropriate.

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?

The description is three concise sentences, each earning its place. The first states the primary action, and the next two provide usage guidance. There is no fluff or redundancy, and the key information is front-loaded.

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 tool with zero parameters and a simple list operation, the description covers the essential purpose and when to use it. An output schema exists, so return values are not required in the description. It is complete enough for the tool's simplicity, though it could mention that only immediate contents are listed, hence a 4.

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?

The tool has 0 parameters, so the schema coverage is 100% and the baseline is 4. The description adds no parameter information because there are none; it correctly does not invent any. This matches the baseline.

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 'List files and folders in the root of the sandbox,' giving a specific verb and resource. It distinguishes itself from sibling tools like list_files by explicitly scoping to the sandbox root, making it clear when this tool is appropriate.

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?

The description provides explicit usage scenarios: 'Use this to understand what files are available before organizing or cleaning up the directory' and 'Use this whenever the user asks what files are available or what files can be seen.' It gives clear context but does not explicitly mention alternatives when not to use it, hence a 4.

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