Get a UseQR designer link

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

With no annotations, the description carries the full burden. It usefully discloses conditional behavior ('Prefills ?url= when data is an http(s) URL'), but says nothing about authentication needs, whether the returned link is stable/expiring, or what happens when the input is not an http(s) URL.

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?

Two short sentences with zero waste; the primary behavior (returning the link) is front-loaded and the conditional detail follows.

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 one-optional-parameter tool with no output schema, the description is nearly sufficient: it identifies the returned artifact (a designer link) and the prefill rule. It would be complete with a sentence on the non-http(s) case or the link's stability.

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% and the single parameter's description already explains it is an optional http(s) URL to prefill. The description adds only the conditional detail that prefill happens only for http(s) values, which is marginal value over the schema. Note a small terminology mismatch: it says 'data' while the parameter is named 'url'.

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 ('Return a link to the free designer at https://useqr.co'), which is clearly distinct in kind from the sibling QR-generating tools. It stops short of explicitly contrasting itself with generate_qr_code or create_dynamic_qr_code, so an agent must infer the distinction.

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?

There is no statement of when to use this versus the sibling tools that actually produce QR codes, nor any prerequisites or exclusions. The agent is left to infer that this is for handing a user off to a manual designer rather than generating a code.

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