critique

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

With no annotations provided, the description carries the full transparency burden. It discloses useful behavioral details, including that domains are captured on the fly and that hero images are returned 'yours first,' but it does not mention side effects, whether the URL is modified, or any prerequisites such as authentication.

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 a single dense, well-structured sentence that front-loads the core action and then compacts the return format efficiently. No filler or redundant repetition of the schema is present.

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?

Because there is no output schema, the description compensates by listing the main return components: side-by-side table, findings fields, first change, and hero images. It is complete enough for a simple two-parameter tool, though it omits error behavior and explicit exclusions.

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 compensate. It does: it clarifies that 'url' is the target URL and that 'vs' takes comma-separated reference names or domains. For a two-parameter tool, this is sufficient semantic guidance.

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 names a specific action ('Critique'), a resource ('a URL'), and a target ('against comma-separated reference names or domains'), making the tool's purpose unambiguous. The detailed return-value summary further differentiates it from sibling tools like search, discover, show, and measure.

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 the tool: whenever a URL needs to be compared against reference names or domains. However, it does not explicitly state when not to use it or name alternative sibling tools for related tasks, leaving some routing decisions to the agent.

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