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

Annotations already declare readOnly, idempotent, non-destructive, and closed-world. The description adds two facts the annotations do not carry: it consumes no browser session and costs nothing. It does not clarify whether results are cached or how large the returned guidance is, but that is a modest gap given the annotation coverage.

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 content is reasonably front-loaded, but the first sentence is a long comma-chained list that is hard to parse, and the remaining fragments ('Free, no browser session') read as afterthoughts. Nothing is outright wasted, but the structure could be tightened considerably.

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?

There is no output schema, so the description must characterize the return value, and it does: browser choice, sign-in link, method, screens/menus/actions, notes, and app-specific tools. Combined with the explicit pre-first-step trigger and the free/no-session note, an agent has what it needs to call this correctly.

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?

Schema description coverage is 100%, so both the app slug and the task phrasing are already documented in the schema. The description does not add meaning about how 'app' accepts a name versus a slug, nor how 'task' shapes the returned guidance, so it sits at the baseline.

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 purpose: retrieving guidance on how to operate an app in the Cloud Browser, including which browser to use, the sign-in link, a step-by-step method, screens/menus/actions, and dedicated app tools. That clearly distinguishes it from the cotlet_browser_* action siblings. It is slightly diluted by a long enumeration, but the verb and resource are unambiguous.

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 trigger: 'Call it before the first browser step in an app.' It also scopes applicability: works for any web app, and apps outside Cotlet's catalog fall back to the general method. It does not say when to skip it (e.g., repeat calls in the same session), which keeps it from a 5.

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