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

Annotations already declare this a safe, read-only, idempotent, closed-world call. The description adds two genuinely useful facts beyond them: the call is 'Free, no browser session' (so no session cost or navigation side effect) and it returns concrete content — sign-in link, step-by-step method, screens, menus, actions, notes, and any dedicated app tools. That is real added context, though it stops short of stating rate limits, guide staleness, or how thorough the content is.

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 purpose and the 'call before the first browser step' instruction lead, followed by scope and a cost note, so the essentials are front-loaded. The long comma-separated enumeration of what the guide contains is dense but each item is informative rather than filler. It is slightly wordier than necessary but nothing is wasted outright.

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 no output schema, the description carries the job of telling the agent what comes back, and it does: browser choice, sign-in link, method, screens, menus, actions, notes, and dedicated tools. Combined with the safety annotations and fully documented parameters, an agent has enough to decide to call it and to interpret the result; only depth/format of the returned guide is unspecified.

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 both parameters (app name/slug with a Houzz Pro default, and the user's task wording) are fully documented in the schema. The description adds only an indirect signal — 'works for any web app' — about the app parameter's scope, and nothing about how the task string shapes the returned guidance. Baseline 3 is appropriate when the schema carries the parameter burden.

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 states what the tool retrieves — a how-to guide for operating a specific web app through the user's Cloud Browser — and separates it from the browser_* action siblings by framing it as the preparation step. The opening phrase is more title-like than verb-led ('How to work in an app'), but the surrounding clauses make the resource unambiguous.

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 an explicit trigger: 'Call it before the first browser step in an app.' It also pre-empts a common doubt by noting the tool works for apps outside Cotlet's catalog, which falls back to the general method. There is no explicit when-not-to-call guidance (e.g., whether to re-call after already holding the guide), which keeps it short of a 5.

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