Type into a field

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

With no annotations, the description carries the full burden. It discloses one side effect ('optionally submitting the form'), but not whether typing clears the existing value, fires input/change events, waits for navigation, or what happens on a failed submit. Critical mutation behavior is undisclosed.

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?

A single sentence with the core action front-loaded and the sibling reference and optional behavior tucked into a parenthesis. No filler, nothing to trim.

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 mutation tool with zero annotation coverage, no output schema, and 0% parameter documentation, the description leaves significant gaps: field-clearing behavior, event firing, submit side effects, and failure handling are all unaddressed.

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 0%, so the description must compensate. It explains 'target' (an id sourced from browser_elements) and 'submit' (submitting the form), covering two of three params, but says nothing about whether 'text' appends to or replaces existing content, or any format expectations.

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?

States a specific verb ('Set the value') and resource ('form field') and links the target to browser_elements, which distinguishes it from browser_click and browser_read. It stops short of explicitly contrasting itself with sibling tools, but the purpose is unambiguous.

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 parenthetical '(id from browser_elements)' implies a workflow prerequisite — call browser_elements first to obtain the target id — but no when-to-use/when-not guidance or alternatives are given. Usage is implied rather than stated.

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