type

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

With no annotations provided, the description must carry behavioral context. 'Key-by-key' adds meaningful insight into the mechanics of the action, but it does not disclose other important traits such as mutability, prerequisites, focus/visibility requirements, failure behavior, or permission needs. It is more than a tautology but still incomplete.

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, front-loaded sentence: 'Type text (key-by-key) into an element.' It is direct and wastes no words, while still adding the meaningful 'key-by-key' detail.

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 tool has six parameters, no output schema, and no annotations, the description is minimally adequate but lacks guidance on when to prefer it over siblings or how it relates to other keystroke tools like 'fill' or 'press'. It is complete enough for a simple call but not fully contextual.

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 100%, so all parameters already have semantic explanations. The description does not add any extra detail about parameters beyond the schema, which matches the baseline for full schema coverage. It does not harm, but it also doesn't add 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 clearly states the verb 'type' and the resource 'text into an element,' and adds the specific behavior 'key-by-key,' which distinguishes it from a bulk-fill operation. It does not explicitly name a different sibling, but the phrasing signals the unique behavior among tools like 'fill' or '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?

The description gives no guidance on when to choose this tool over alternatives such as 'fill,' 'press,' 'keys,' or 'click.' It neither states preferred use cases, exclusions, nor alternative selection, leaving the agent to infer based on tool names alone.

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