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

Annotations already declare readOnly, idempotent, and non-destructive, so safety is covered; the description adds value beyond them by noting it is 'Free, no browser session,' which tells the agent there is no cost or live session to manage. Enumerating the guide's sections also effectively describes the return content despite no output schema.

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?

Appropriately short and front-loaded, but delivered as one dense run-on sentence with a comma-chained list of guide contents that is harder to scan than a split structure would be. Nothing is truly wasted, yet the packing reduces skimmability.

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 two-parameter, guidance-only tool with no output schema, the description covers what it returns, when to call it, and its cost/session footprint. The remaining gap is the undocumented default app value (EmailOctopus), which an agent would otherwise have to infer that omitting is fine.

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 optional parameters are already documented, making 3 the baseline. The description hints at app scoping ('which browser to use for this workspace') but says nothing about the 'task' parameter tailoring the returned method, nor about the schema's EmailOctopus default.

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 deliverable: guidance on driving a specific app inside the user's Cloud Browser, covering the browser choice, sign-in link, step-by-step method, screens/menus/actions, and app-specific tools. That clearly separates it from the cotlet_browser_* siblings, which perform actions rather than explain them. It stops short of a crisp 'returns an instruction document' framing, leaning on 'How to work in an app' as the verb phrase.

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?

Provides an explicit trigger ('Call it before the first browser step in an app') plus a coverage rule: any web app works, and apps outside Cotlet's catalog fall back to the general method. It does not state when-not to call (e.g., once the method is already in hand) or point to cotlet_apps as the way to resolve an app name.

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