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

Annotations already declare readOnlyHint=true and destructiveHint=false, and the description confirms and explains that ("opens nothing by itself"), which is consistent rather than contradictory. It adds genuinely non-obvious context: the return value is a procedural guide, the action must be completed through the browser tools, and there is no official MCP server so the official API is not an option. It omits edge cases such as what happens when no browser session or no ServiceTrade login exists.

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 critical detail (it returns instructions and mutates nothing) is buried in the second sentence behind a title-restating opener and a promotional phrase ("from ChatGPT, Claude or any AI agent"). The final sentence about the official REST API and the "checked 23 Oct 2026" date is meta-context that helps an agent decide not to reach for the API, but it is longer than needed.

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 tool, the definition covers the essentials: what is returned (step-by-step screens, buttons, fields) and what to do with it (cotlet_browser_*). It is a bit thin on return format specifics and on prerequisites (signed-in Cloud Browser, correct account), which is the remaining gap.

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 the schema cannot be improved on and the baseline is 4. The description does not need to explain parameter meanings, and it correctly implies the tool needs no inputs because the targeting happens later in the browser flow.

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 first sentence restates the title ("Create appointment in the user's own ServiceTrade account"), but the second sentence gives the real, specific behavior: it "Returns how to do it in ServiceTrade step by step (screens, buttons, fields) and opens nothing by itself." That distinguishes this tool from the cotlet_browser_* tools that actually perform the clicks. The only weakness is that the true read-only nature is disclosed after a name/opening line that implies creation.

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 clearly states the context of use (creating an appointment in the user's ServiceTrade account) and the required follow-up sequence: call this first to get the steps, then execute them with cotlet_browser_* in the Cloud Browser. It does not address when to prefer a different servicetrade_* sibling (e.g. create_quote) or what to do if the user has no active browser session.

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