execute_script

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 omits crucial aspects like the ability to modify page state, potential destructive effects, return value semantics, and error behavior. Telling users to include a return statement is a requirement, not a transparent description of side effects.

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 extremely concise, with a single purpose statement followed by two essential usage notes. It is well-front-loaded and contains no filler or redundancy.

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 no output schema and no annotations, the description is under-specified for a powerful script execution tool. It fails to explain what the function returns, how to handle results, what happens on errors, or potential side effects, leaving significant gaps for an agent to safely and correctly invoke the tool.

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 coverage is 100%, so baseline is 3. The description's parameter-related advice ('Must include a return statement', 'Set awaitPromise=true') largely duplicates the schema descriptions, adding no significant extra meaning beyond what structured fields already communicate.

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 specific verb 'Execute' and resource 'JavaScript in the page context', which distinguishes it from sibling tools like perform_interaction or navigate_and_extract_content. It immediately conveys the tool's core function and scope.

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?

Usage is implied: executing JS in the page context. The description adds 'how-to' guidance, such as requiring a return statement and setting awaitPromise for async code, but does not explicitly state when to prefer this over alternatives or mention exclusions.

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