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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, so the safety profile is covered. The description adds useful behavioral context beyond that: the interactive gallery presentation, available export formats (SVG, PNG, PDF, EPS), and account-scoping behavior. No contradiction with annotations.

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?

Three sentences with no fluff. The main purpose is front-loaded, the gallery contents are compactly enumerated, and the parameter-dependent behavior is placed last. Every sentence 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?

With a full input schema, output schema, and safety annotations, the description supplies the remaining selection and scoping context: when to use it, what the gallery contains, and how qr_id changes the behavior. A minor gap is not explicitly routing the user away from sibling tools like list_links for programmatic use cases.

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?

Input schema coverage is 100%, and both parameters already have descriptions. The description does add the conditional behavior of qr_id ('show only that link; otherwise show links from the active account'), but it mostly restates what the schema conveys, so it earns the baseline rather than exceeding it.

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 resource ('QRCodeKIT links') and the action ('Display ... in an interactive gallery'), then lists the concrete contents: short URL, QR image, combined click-and-scan totals, and download actions. This distinguishes it from sibling link-management tools such as list_links or delete_link.

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?

It gives explicit trigger language: 'Use this when the user asks to see, show, preview, display, or download their links or QR codes.' This is strong when-to-use guidance, though it does not explicitly name an alternative or state when not to use the tool.

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