playwright__browser_type

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

The description adds little beyond annotations. While annotations indicate the tool is destructive (destructiveHint: true) and not read-only, the description does not elaborate on side effects (e.g., replacing content, pressing Enter with submit, typing character by character with slowly). The agent gains minimal behavioral context from the description alone.

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, containing no wasted words. It front-loads the core action. However, it is perhaps too brief given the tool's multiple parameters and behavioral nuances, but still efficient.

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?

With five parameters and no output schema, the description should provide a fuller picture of the tool's behavior. It does not explain how the tool interacts with the page (e.g., focusing the element, clearing content), nor does it mention the optional 'slowly' or 'submit' behaviors. The agent would need to rely heavily on the schema and trial-and-error.

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 coverage is 100%, so baseline is 3. The description adds the context that the element must be 'editable', which is not in the schema. This provides marginal additional meaning, but no further parameter detail beyond what the schema already supplies.

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 'Type text into editable element' uses a specific verb and resource, clearly indicating the tool inputs text into an editable field. However, it does not distinguish itself from sibling tools like playwright__browser_fill_form or playwright__browser_press_key, which also involve text entry, so it loses a point.

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. Siblings such as fill_form (for multiple fields), press_key (for single keys), or click (to focus) are not mentioned, nor are any exclusions or prerequisites given.

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