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

Annotations already declare readOnlyHint=true and openWorldHint=false; the description reinforces this with 'opens nothing by itself', which is the key behavioral fact an agent needs to avoid assuming the call performs the listing. It also adds outside context explaining why the API is not used (paid production access after a staging request), motivating the browser path. It does not describe error or edge-case behavior, so not 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 operative content (what it returns, that it opens nothing, and to use cotlet_browser_* next) is front-loaded and clear. The trailing sentence about WellnessLiving's paid API access, complete with a checked date, reads as justification rather than actionable guidance and pads the definition.

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 guide tool with no output schema, the definition covers purpose, the nature of the return value, and the follow-up tool family, which is what an agent needs to chain it correctly. What is missing is any note on preconditions such as an authenticated Cloud Browser session.

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 and the schema is empty, so there is nothing for the description to clarify. Baseline for a 0-param tool is 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?

States the specific resource (clients in the user's WellnessLiving account) and, unusually, discloses that the tool does not list anything itself but returns step-by-step instructions (screens, buttons, fields). That distinction from the cotlet_browser_* tools that actually perform the listing is made explicit. It does not differentiate itself from sibling wellnessliving_* tools like list_schedule, so it stops short of a 5.

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?

Gives a clear workflow: call this first to get the steps, then execute them with cotlet_browser_* in the user's Cloud Browser. The scope is bounded to the user's own account. No explicit when-not-to-use or prerequisite (e.g., logged-in session) is stated, keeping it below 5.

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