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

The annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, and 'opens nothing by itself' is consistent with them, so no contradiction. The description adds the important behavioral fact that the output is instructional text rather than an action, but says nothing about whether the guidance depends on account state, whether a browser session must exist, or what the response actually looks like.

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 instruction is front-loaded and easy to act on, but 'from ChatGPT, Claude or any AI agent' is filler and the closing paragraph about GetYourGuide's Supplier API and connectivity testing is tangential justification that does not help the agent decide or act.

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 input schema, no output schema and no annotations beyond safety hints, the description carries the full load and mostly does it: it says what is returned and which tools to use next. It still omits prerequisites such as an authenticated browser session and any note that the guidance is generic rather than tailored to a specific availability change.

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?

There are zero parameters, which sets the baseline at 4, but the description never makes the no-input contract explicit, so an agent may reasonably wonder whether it should pass a date range or availability spec and get nothing back. The content that is present, the API explanation and the browser hand-off, adds no parameter meaning.

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 concrete behavior: it 'Returns how to do it in GetYourGuide step by step (screens, buttons, fields)' and explicitly contrasts that with the sibling browser tools that actually perform the action. The name 'update availability' implies a mutation, so the reader has to get past a misleading label before reaching the real purpose, which keeps this from 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 an explicit sequence: call this first to get the steps, then execute them with the cotlet_browser_* tools in the user's GetYourGuide Cloud Browser. What is missing is the starting condition — whether a browser session must already be open, whether the user must be logged in, and how this differs from getyourguide_update_pricing.

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