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

Adds material behavior beyond the annotations: it returns URL and title, refuses certain sensitive buttons, costs credits per started minute, and the session ends on close or after three minutes of inactivity. These are exactly the side effects and constraints an agent needs before invoking a destructive, open-world click.

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 action and return value, then packs refusal rules and session economics into a few short sentences. Every sentence adds useful operational information; none is filler.

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 destructive open-world browser action with no output schema, the description still explains the return value, the refusal cases, and the session cost/lifecycle. There is no material gap an agent would need filled before calling it.

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 sole parameter already documents that 'element' is the number in the current page's element list. The description reinforces that meaning but adds no format or edge-case detail beyond the schema, so baseline 3 is 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?

Names a specific verb ('Clicks') and resource ('link, button or other element of the current page'), and pins it to a concrete mechanism (element number in the page's element list). That is enough to distinguish it from sibling browser tools such as navigate, press, or type without opening the schema.

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?

Gives clear operating context (current page, acting as the user) and explicit exclusions for pay/buy and account/sign-in buttons. It stops short of naming alternative browser tools for non-click actions, so it is strong but not a full when/when-not/alternatives guide.

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