browser_press_key

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

With no annotations, the description is the only source of behavioral information. It does not disclose whether the key press is a down/up pair, how modifiers are handled, whether it waits for the page, or what happens if no element is focused. This is minimal transparency.

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 clear sentence and is appropriately concise. However, it is so brief that it omits useful context, though that is more a completeness concern than a conciseness issue.

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?

Given the absence of annotations and output schema, this one-sentence description is insufficient. The tool's relationship to key_down/up, valid key formats, and behavior on focused elements are not covered.

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 schema documents three of four parameters, but the required 'key' parameter lacks any description in both the schema and tool description. The description adds no parameter semantics beyond the schema, leaving key value formats 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 description uses a specific verb ('Press') and resource ('a key') and provides context (selected page or focused element). However, it does not distinguish from sibling tools like browser_key_down or browser_key_up, and 'press' could imply a full key press without clarifying modifier keys.

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 like browser_type, browser_key_down, or browser_key_up. No exclusions or preferred scenarios are mentioned.

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