execute_script

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

There are no annotations, so the description carries the full burden of behavioral disclosure. It mentions that execution happens in the page context and that a result is returned, but it does not disclose potential side effects, page mutations, navigation, async behavior, or the risk of arbitrary code execution.

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, clear, front-loaded sentence with no filler. It is concise and easy to parse, though the brevity leaves important details out.

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 no annotations and no output schema, this one-line description is not complete enough for a powerful arbitrary-code execution tool. It lacks side-effect warnings, execution model details, and any usage boundaries that an agent would need to invoke the tool safely and correctly.

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 adds only minimal meaning beyond the schema's 'script' property. It tells the agent that the script is JavaScript executed in the page context, but it does not clarify acceptable script format, whether expressions versus statements are allowed, or how return values are serialized.

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 a specific action—executing JavaScript in the page context—and notes that a result is returned. This distinguishes it from the sibling browser automation tools, which handle navigation, clicking, typing, and reading page content rather than arbitrary script execution.

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 about when to use this tool versus the many sibling tools, nor are there any exclusions or warnings. An agent must infer that this is for cases where dedicated browser commands do not suffice, but the description does not say so explicitly.

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