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

Annotations already flag destructiveness, open-world, and non-idempotency, but the description adds substantial context: it acts as the user, refuses payment and sign-in buttons, and details a per-minute credit cost plus a 3-minute idle session timeout. These behavioral traits exist nowhere in the structured fields.

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?

Front-loads the core action, then layers caveats (refusals, cost, timeout). Every sentence carries useful information, though the pricing/session detail is dense and could be trimmed slightly.

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, but the description states the return value (URL and title after click). Combined with refusal policy and session lifecycle, an agent has nearly everything needed to invoke correctly; only explicit sibling differentiation 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?

Schema coverage is 100% and the element param is documented in the schema as its number in the element list. The description's phrasing mirrors that, adding little new meaning beyond the schema. Baseline 3 appropriate.

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?

Specific verb (clicks) and resource (link, button, or element of current page), scoped by element number, and states the return value (URL and title). Clearly distinct from siblings like browser_press, browser_type, or browser_navigate.

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?

Implies use for clicking links/buttons and notes two refusal conditions (pay/buy buttons, sign-in/account pages). However, it doesn't explicitly contrast with siblings such as browser_press or browser_navigate, leaving the when-to-use-this-vs-alternatives inference to the agent.

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