Roo — configure QR add-on

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

No annotations are provided, so the description carries the behavioral disclosure burden. It adds genuinely useful context by explaining that 'Roo requires all 6 fields; the tool defaults them all' — meaning optional schema fields are defaulted. But it does not disclose whether existing QR settings are overwritten, whether changes are reversible, or what happens on success beyond the implication that the add-on becomes enabled.

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 two sentences with no wasted words. The opening sentence states the purpose, the second sentence adds a critical behavioral hint about defaults and gives a clear follow-up action. Each 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?

The description is reasonably complete given the strong schema and clear sibling workflow, but without annotations or an output schema it leaves some behavioral uncertainty: what the success result looks like, whether existing QR configuration is replaced, and whether there are any side effects. For a mutation-style tool, this missing context prevents a higher score.

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?

The input schema has 100% description coverage of all seven parameters, including defaults, enums, ranges, and patterns. The description adds only the note that all six non-required fields are defaulted by the tool. Since the schema already documents every parameter in detail, the description does not significantly amplify parameter meaning.

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 action: 'Configure and enable the QR code add-on on a shortlink.' It names a specific verb, resource, and outcome, and the phrasing distinguishes it from sibling roo_get_qr_code, which fetches the rendered image rather than configuring it.

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 gives clear contextual guidance by noting that after this tool succeeds, the agent should use roo_get_qr_code to fetch the image. This establishes a workflow. However, it does not explicitly state when to avoid using this tool or what distinguishes it from other update/configure siblings, so it stops short of full alternative-condition guidance.

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