set_value

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

No annotations are provided, so the description carries the behavioral disclosure burden. It adds a meaningful trait by saying the operation is 'atomic', which implies the value is set in one operation rather than through incremental typing. It does not mention permissions, failure modes, or what happens to existing content, leaving some behavioral gaps.

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 one short sentence that front-loads the core action and then gives the sibling preference. There is no redundant content or wasted wording.

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 tool with two required parameters, one of which is a nested target object, and with no output schema or annotations, the description is too thin. It provides useful atomicity and preference hints, but it does not explain how to construct `target` or what constraints apply when setting a value, making correct invocation uncertain.

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, but it only clarifies that `value` is the value of an editable element. The nested `target` object with `type`, `index`, and `state_id` is completely unexplained, leaving the agent to guess how to address the element.

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 states a specific action and resource: 'Atomically set the value of an editable element.' It also distinguishes itself from the sibling tool `type` by explicitly saying it is preferred over `type`, so an agent can identify the correct tool immediately.

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 clear routing guidance by naming `type` as the alternative and stating that `set_value` is preferred over it. However, it does not explain when `type` should be used instead or provide any exclusion conditions, so it stops short of full when-to-use/when-not-to-use coverage.

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