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

The annotations already declare readOnlyHint=true, idempotentHint=true and destructiveHint=false; the description reinforces rather than contradicts them by saying it 'opens nothing by itself'. It adds genuinely useful context beyond the annotations: that the return is procedural guidance (screens, buttons, fields) and that any actual change happens through a separate browser tool. It stops short of covering session/auth prerequisites or failure modes for the browser hand-off.

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 mechanics and the browser-tool hand-off are front-loaded in the first two sentences, which is good. The trailing 'Kitomba's official API...' sentence is long, tangential to invocation, and includes a parenthetical check date that adds bulk without changing how the agent calls the tool. The lead clause 'Book appointment...' also invites a false reading that the sentence must then correct, costing a beat.

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 burden of describing the return and does so concretely ('step by step (screens, buttons, fields)'). The absence of a public Kitomba API is explained, justifying the browser-based route. What is missing is the operational preconditions for the follow-up browser calls, such as authentication state or whether the agent should first locate the client or free slot.

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 no parameters, so per the baseline this scores 4. The description is consistent with that by framing the output as generic step-by-step instructions rather than something parameterized, though it never explicitly notes that the agent cannot scope the guidance to a particular client or time slot. Schema coverage is 100% and the schema is empty, so there is little further semantic work to do.

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 a specific verb and resource (book an appointment in the user's Kitomba account) and then clarifies the actual mechanic: it returns step-by-step instructions rather than performing the booking. This distinguishes it from the cotlet_browser_* action tools it hands off to. The opening phrasing 'Book appointment...' initially reads like a write action, so the agent must read further before learning the tool only produces a guide, which keeps it just 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?

It gives a clear usage chain: call this first to get the steps, then execute them with cotlet_browser_* in the Kitomba Cloud Browser. However, it never states when to prefer this over siblings like kitomba_rebook_appointment or kitomba_find_free_slots, nor any prerequisite such as being logged in or having located the client/slot first. Usage is implied by the workflow narrative rather than stated as selection criteria.

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