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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false. The description adds useful context beyond those annotations: it returns step-by-step screen/button/field guidance and explicitly does not open or act on anything itself.

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 purpose and handoff are front-loaded, but the phrase 'from ChatGPT, Claude or any AI agent' is redundant and the official-API chronology note is tangential to invoking this specific tool. The description is not bloated, but some sentences do not directly help an agent select or call it.

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, read-only tool with no output schema, the description gives enough: it states the output nature (step-by-step screens, buttons, fields), clarifies that it performs no actions, and explains the follow-up browser workflow. Account-login prerequisites are only implicit rather than explicitly stated.

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 has zero parameters, so there is no parameter semantics to explain. The description appropriately adds context that the instructions pertain to the user's own Airalo account, which is useful despite no input fields.

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: getting install instructions in the user's own Airalo account. It also distinguishes the tool from the browser-action siblings by saying it 'opens nothing by itself' and that execution should then use cotlet_browser_* tools.

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 says to use this tool to retrieve step-by-step instructions and then use cotlet_browser_* tools to perform the actions in the user's Airalo Cloud Browser. It does not explicitly state when not to use it or name non-browser alternatives, but the intended workflow is clear.

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