click

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

With no annotations, the definition has to carry all behavioral disclosure, and it does add value by warning that page content is untrusted and that clicks cause external side effects. It does not cover error modes, what happens if the click target is missing, or whether the action waits for navigation, so the disclosure is only partial.

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?

Three short sentences, front-loaded with the action and its scope, with the safety caveats after. Nothing is wasted, though the safety note is somewhat generic boilerplate.

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 mutation tool with no annotations and no output schema, the definition covers the safety profile but is silent on parameter meaning and on what a successful or failed click returns. An agent would not know how to obtain a valid 'handle' from this definition alone.

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 definition has to fill the gap for both parameters. It never explains what 'handle' refers to — an element reference from read_page, a selector, something else — or how 'tabId' relates to 'list_tabs', leaving the most important parameter ambiguous.

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 definition uses a specific verb ('click') and scopes the target to 'a user-granted tab', so an agent can identify the action. It implies differentiation from siblings like 'type' and 'navigate' by role, but never explicitly names them, so the separation relies on inference.

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?

The definition says clicks must happen in a user-granted tab and that the user must have authorized the action, which gives some context. It does not say when to prefer this tool over 'type' or 'navigate', or what happens if the tab or handle is stale.

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