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

Annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false, so safety and repeatability are covered elsewhere. The description adds that the link spans two platforms and what happens to the user's designs in the app, but says nothing about link lifetime, whether it is personalized, or whether it can be shared — the details that would actually change how an agent presents it.

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?

A single sentence that front-loads the deliverable (the download link) and then adds the value context. No filler, no repetition of the title or annotations.

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 zero-parameter, no-output-schema read, the description tells the agent enough to call it and to explain the result to a user. The only gap is that it doesn't clarify whether the returned link is a generic store URL or something tied to the user's account, which would matter for how the agent frames it.

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 tool takes zero parameters, so there is nothing for the description to disambiguate; the baseline for a no-arg tool applies. The description correctly does not waste words on inputs.

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 the concrete artifact returned (a download link for the House AI app) and scopes it to iPhone and Android, so an agent knows exactly what this produces. It doesn't explicitly contrast with siblings, but the resource is distinctive enough that confusion with actions like redesign_room or list_my_designs is unlikely.

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?

Usage is only implied: the mention of saved designs, continued room editing, shopping the look and trying styles suggests calling this when the user wants to move to the mobile app. There is no explicit when-to-use or when-not-to-use guidance, and no sibling tool is named as an alternative.

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