browser_press_key

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

The description adds no behavioral detail beyond what annotations already provide (readOnlyHint=false, destructiveHint=true). It does not mention whether the key press is a full down+up cycle, whether it requires focused element, or potential side effects. The description essentially restates the title, offering no additional context.

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?

The description is a single, concise sentence that directly conveys the tool's purpose. It is front-loaded and contains no filler, making it efficient and easy to parse.

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 simple one-parameter tool with complete schema and annotations, the description is mostly adequate. However, it lacks guidance on when to use it relative to similar tools and does not explain nuances of key pressing (e.g., event behavior), so it is not fully complete.

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?

The input schema fully documents the single 'key' parameter with an explanatory description and example values. Since schema coverage is 100%, the description does not need to elaborate on parameters. Baseline of 3 is appropriate; the description adds no extra meaning.

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 description 'Press a key on the keyboard' clearly states the action (press) and the resource (key). It is specific and unambiguous, but it does not explicitly differentiate from sibling tools like browser_key_down_up or browser_dispatch_event, so it lacks sibling distinction.

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?

There is no guidance on when to use this tool versus alternatives. The description does not mention prerequisites, exclusions, or scenarios for which browser_type or browser_key_down_up would be preferred. Users must infer usage from the tool name and schema.

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