playwright_close

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

With no annotations provided, the description carries the full burden of disclosure. It clearly states the primary behavior—closing the session and its browser—and is accurate. However, it does not mention side effects such as unsaved state or behavior when no active session exists, which would add further context.

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 that states the action and target immediately. Every word adds meaning, with zero 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?

For a zero-parameter close tool with an output schema, the description is sufficient to convey the tool's role and behavior. It covers the essential lifecycle action and does not need to explain return values, as the output schema handles that.

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?

The tool has zero parameters, so schema coverage is 100% trivially. Per the baseline for 0 parameters, a score of 4 is appropriate. The description correctly omits parameter details, and nothing contradicts the empty schema.

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 uses a specific verb ('Close') and clearly identifies the resource ('interactive Playwright session and its browser'), which distinguishes it from sibling tools like playwright_start and playwright_navigate. 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?

Usage is implied as the counterpart to starting a Playwright session, but the description does not explicitly state when to use this tool versus alternatives, nor does it mention any prerequisites or exclusions. It provides no direct guidance on lifecycle context.

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