type

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

No annotations are provided, so the description must fully disclose behavior. It covers trusted=true for real keystrokes, but fails to describe other important behaviors (e.g., effect of clear, keyEvents, pressEnter, error handling, or prerequisites). Significant gaps remain.

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 two sentences with no fluff. Every phrase earns its place: primary action and key behavioral note. Ideal length for a simple typed tool.

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 8 parameters and no output schema, the description is incomplete. It does not explain return value, error conditions, prerequisites (e.g., element visibility), or how parameters interact (e.g., clear vs keyEvents). The tool is contextually underdescribed.

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 only 38%, placing the burden on the tool description. Only the 'trusted' parameter gains partial explanation; remaining parameters (text, ref, selector, clear, tabId, keyEvents, pressEnter) lack semantic context beyond their names.

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 clearly states 'Type text into an element,' providing a specific verb and resource. It adds nuance about trusted=true for controlled inputs, but does not explicitly distinguish from sibling tools like fill_form or press.

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 description hints at a usage guideline (trusted=true for React/Vue), but lacks explicit when-to-use, when-not-to-use, or alternatives. The context is implied rather than direct.

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