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

Annotations already declare readOnlyHint=true, idempotentHint=true, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description adds the genuinely useful behavioral fact that it 'opens nothing by itself', preventing a false assumption that calling it navigates or mutates anything. The API-availability paragraph explains why browser automation is needed but is dated research minutiae rather than behavior the caller must act on.

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 guidance is front-loaded and clear, but the closing sentence enumerates specific URLs returning 404 on a specific date, which is verbose evidence rather than actionable information for an agent. That detail earns its place only partially, as justification for the browser-tool fallback.

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 parameters and no output schema, the description carries the burden of explaining the return value, and it does so reasonably: step-by-step screens, buttons and fields. It does not describe the shape of that output (e.g. numbered list versus prose), which would help an agent consume it, but nothing critical is missing.

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 takes zero parameters, so the baseline is 4; there is nothing for the description to disambiguate. The description correctly implies a no-argument lookup and does not invent parameter expectations.

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?

Description uses a specific verb and resource: it returns step-by-step instructions for historical payroll in EZ Lawn Biller, covering screens, buttons and fields. It also makes explicit that it performs no action itself, which distinguishes it from action-oriented siblings such as run_payroll or finalize_payroll, though it never names those siblings directly.

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 clear procedural guidance: use this tool to get the steps, then execute them with the cotlet_browser_* tools in the user's Cloud Browser. It stops short of saying when to choose historical payroll versus review or run payroll, so the routing between siblings is left implicit.

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