browse_categories

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It discloses that only category names are returned (not the full 1.5MB raw tree), that a leaf or empty subtree yields an empty list, and that data is licensed CC BY-NC-SA (non-commercial). It doesn't explicitly state whether invalid paths cause errors, but the overall behavior is well specified. This is solid but not exhaustive.

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 well-structured, starting with a one-sentence purpose, then behavior details, arg explanation, and a licensing note. Every sentence adds value, with no fluff. The format is easy to scan and front-loaded with the most important information.

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 simple one-parameter browsing tool, the description covers all essential context: top-level behavior, nested path behavior, leaf behavior, return format (names only), and data licensing. The presence of an output schema likely covers return structure, so the description doesn't need to explain it. This is complete for the tool's complexity.

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 0%, so the description must fully compensate for the single 'path' parameter. It does: it explains that path is optional, slash-separated, gives examples ('Mac' or 'Mac/Mac Laptop'), and clarifies that an empty string means the top level. This is exemplary parameter documentation.

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 starts with a specific verb+resource: 'Browse iFixit's device category tree.' It clearly distinguishes itself from sibling tools (which handle guides, devices, users) by focusing on category navigation. The behavior with and without a path is explained, making the purpose unmistakable.

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 clear context on when to use the tool: use it with no path for top-level categories, or with a slash-separated path to descend into the tree. It doesn't explicitly name alternatives or exclusions, but the context of sibling tools makes the usage scenario obvious. It falls just short of a 5 because it doesn't explicitly say 'for guides use list_device_guides' or similar.

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