URL Availability Checker

This tool validates a list of URLs for availability, captures redirect chains, and flags dead links, producing a structured per-URL report suitable for citation verification. It accepts a single required input parameter urls, which is an array of http or https URL strings to be checked. The calling system uses these URLs to drive any necessary network probing or diagnostics, and this worker converts the provided inputs into the final structured result. The model output must strictly validate against the system-provided structured output schema referenced by schemaArtifactId, with correct types and keys and no extra fields.