click

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

With no annotations, the description carries the full behavioral burden and does so: it discloses the commit-detection heuristic (submit/create/send/save/delete/pay), the out-of-band phone approval and ~5-minute timeout, the failure semantics (denial returns an error and nothing is clicked), and the exemptions for sign-in/search forms.

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?

Every sentence earns its place, covering action, return value, approval semantics, and parameter format. The selector guidance is appended at the end rather than front-loaded, which slightly weakens scanning order.

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?

An output schema already exists, yet the description still notes what is returned (URL and title). Combined with the approval/denial semantics, an agent has everything needed to call this tool safely and predict delays.

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 0%, so the description must document the single parameter, and it does — 'a CSS or Playwright selector' with concrete examples like "button[type=submit]" and "text=Add Server". It stops short of stating ambiguity/unique-match behavior, so it is good but not exhaustive.

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?

States a specific verb (click) and resource (an element on the current page), and specifies the return value (URL and title). An agent can distinguish it from siblings like type_text, fill_secret, and navigate without opening any 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 situational context: clicks that commit something trigger an owner approval flow with a ~5-minute wait, while sign-in and search forms are not interrupted. It doesn't name sibling alternatives (e.g., when to prefer fill_secret or type_text), so routing guidance is implicit rather than explicit.

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