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

Annotations already declare read-only, idempotent, non-destructive, and closed-world behavior, so the safety profile is covered. The description earns credit by adding two facts not in annotations: the call is free and it opens no browser session, which matters for cost/session planning before using a paid browser tool. It stops short of describing output format or size, which is a minor gap for a guide-fetching tool.

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 relevant but poorly front-loaded: the key directive ('call it before the first browser step') sits in the middle of a long colon-list, so an agent scanning the opening clauses must parse the inventory first. The enumeration of guide contents is useful but could be trimmed; there is no filler text, just awkward ordering.

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?

No output schema exists, so the description carries the burden of saying what comes back, and the inventory (browser choice, sign-in link, method, screens, menus, actions, notes, dedicated tools) does that adequately. For a two-optional-parameter read-only guide tool, an agent has enough to decide and call correctly; only the default app behavior and result size are left to the schema and inference.

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 coverage is 100% and both parameters (app, task) are fully documented in the schema, so the baseline of 3 applies. The description only alludes to them obliquely ('one outside Cotlet's catalog', 'works for any web app') without explaining how the app or task inputs shape the returned guidance. It therefore adds little meaning beyond the schema.

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 resource — guidance for operating an app through Cotlet's Cloud Browser — and enumerates what the guide contains (which browser/sign-in link, step-by-step method, screens, menus, actions, notes, dedicated tools). It distinguishes itself from the many 'cotlet_browser_*' siblings by being the preparatory how-to rather than an action. The phrasing is dense but unambiguous about what the tool returns.

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?

'Call it before the first browser step in an app' gives an explicit, actionable timing rule that an agent can follow without inference. It also clarifies coverage — any web app, with catalog apps getting dedicated content and others the general method — though it never states when *not* to call it (e.g., mid-task or for repeat calls).

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