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

Annotations already declare readOnly, idempotent, non-destructive, closed-world behavior, and the description reinforces the key trait that matters here: it 'opens nothing by itself' and only returns instructions. The API note explaining that AestheticsPro has no public/self-serve API adds real context for why browser tools are needed. Return-format details (exact structure of the steps) are not given, keeping it below a 5.

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 core behavior and the follow-up workflow are front-loaded in the first two sentences. The closing paragraph about AestheticsPro's Enterprise-only API is longer than strictly necessary but supports the routing decision, so it earns most of its space.

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 no-parameter, no-output-schema guidance tool, the description covers what it returns and what it does not do, which is the essential information. A brief note on the shape or scope of the returned steps would make it fully complete.

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. Baseline for a parameterless tool is a 4.

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 a specific resource (Book Now availability) and clarifies that the tool returns step-by-step instructions (screens, buttons, fields) rather than the availability data itself. This resolves the ambiguity created by the name. It does not, however, contrast itself with close siblings such as aestheticspro_view_scheduling_changes_and_availability or aestheticspro_configure_book_now.

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 a clear usage context: call this to learn the procedure, then execute it with the cotlet_browser_* tools in the user's Cloud Browser. That sequencing is explicit. What's missing is any guidance on when to prefer the AestheticsPro siblings instead, or when this tool is unnecessary.

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