chrome_open

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

No annotations are present, so the description carries the full burden of behavioral disclosure. It only restates the action without mentioning side effects (e.g., launching Chrome, focusing the new tab), failure conditions, or whether the phone must be unlocked or connected.

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?

One short, front-loaded sentence with no redundant wording. Every word contributes to the core action, making it easy to parse quickly.

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?

Although the tool is simple, the description omits the optional device parameter and provides no preconditions or side-effect context. With no annotations to compensate, it is not complete enough for reliable invocation in multi-device scenarios.

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%, and the description adds no real parameter meaning beyond the property names. It repeats 'URL' but does not explain the device parameter, its default value, or how it selects among multiple phones.

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 action (open) on a precise resource (a URL in a new Chrome tab on the phone). The phrase 'new tab' differentiates it from related Chrome tools such as chrome_navigate or chrome_close_tab without needing extra context.

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?

No guidance is provided on when to use this tool versus alternatives like chrome_navigate or chrome_read, and no prerequisites are mentioned. The usage is only implied by the action itself rather than explicitly stated.

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