cadlens_parse_url

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

With no annotations, the description carries the full burden of disclosing behavior, but it only mentions a size limit (max 100 MB) and the action of parsing. It fails to disclose whether parsing is asynchronous (despite webhook_url and notify_email parameters suggesting a job-based flow), what the response format is, what happens after parsing, or any side effects. The reference to 'Same output as cadlens_parse_file' is vague without sibling details.

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 extremely concise, containing two short sentences that front-load the key action and size limit. No unnecessary words or repetition—every word earns its place.

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?

Given the lack of output schema and annotations, and the presence of webhook/notify parameters that hint at job-based asynchronous behavior, the description is incomplete. It does not explain the return structure or job mechanics, and the webhook_url parameter is left undocumented. The brief reference to a sibling tool does not fill this gap.

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 67% (url and notify_email have descriptions, webhook_url does not). The description adds the 100 MB size constraint for the url parameter, which is not in the schema. However, it does not clarify webhook_url, leaving a parameter unaddressed. Overall, the description adds marginal value but relies mostly on the schema.

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 tool's function: 'Download a CAD file from a URL (max 100 MB) and parse it.' It uses specific verbs (download, parse) and a resource (CAD file from URL), and distinguishes itself from the sibling tool cadlens_parse_file by explicitly noting 'Same output as cadlens_parse_file' while differing in input source.

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 implies when to use this tool (when you have a URL to a CAD file) and explicitly references an alternative (cadlens_parse_file) by stating the output is the same. However, it does not explicitly state when not to use it or provide a direct comparison beyond the sibling mention.

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