clone_reference_url

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

The annotations only say this is a non-read-only, open-world, non-idempotent, non-destructive operation; the description adds real substance on top: it launches a live browser, prefers embedding the original, otherwise writes a self-contained offline snapshot or a rebuild, and self-verifies against desktop/tablet/mobile screenshots. That is meaningful disclosure of what the tool actually does and what artifacts it leaves behind. It omits cost/latency expectations and any caution about only cloning pages the user has rights to, which caps it at 4.

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?

Front-loaded with purpose, then trigger phrases, then behavior, then return values -- a sensible order with no filler sentences. The second sentence is long and packs several ideas (browser capture, reuse-vs-rebuild, snapshot contents, verification) into one clause chain, which costs some readability but no content is wasted.

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 16-parameter, no-output-schema tool, the description carries the important load: it tells the agent what comes back (clone entrypoint, output directory, fidelity scores) and how the snapshot is produced and validated. Given full schema coverage, the remaining uncovered items -- runtime cost, failure modes, and the permission caveat behind license_text -- are the only notable gaps.

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 coverage is 100%, so the baseline is 3; the description still earns above that by explaining the decision the parameters feed into -- exact faithful clone versus approximate rebuild, and the reuse-versus-rebuild policy that license_text informs. It also connects the multi-viewport verification to the breakpoint/screenshot parameters, adding meaning beyond the schema's field-level text.

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?

States a specific verb and resource ('Clone a web page from its URL') and adds the scope qualifier 'in one call', which hints that this is the orchestrated path rather than the granular steps. It never names a specific sibling such as inspect_url or build_reproduction_bundle, so an agent must infer the boundary from the sibling list alone, which keeps it short of a 5.

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?

Gives strong positive triggers -- 'clone, copy, recreate, mirror, or make a page look exactly like a URL' -- which map well onto how users actually phrase the request. It provides no explicit when-not guidance or routing to alternatives (e.g., use inspect_url if you only want to look, or audit_reference_url to diagnose a past attempt), so the exclusion half of the guideline is missing.

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