playwright_cli_open

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

There are no annotations, so the description carries the full transparency burden. It discloses that the URL must be public and that the operation targets a named session, but it does not mention browser launch behavior, side effects, persistent sessions, or timeout consequences.

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 focused sentence with no filler or redundancy. It is concise and front-loaded, making it easy to parse.

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?

Despite the availability of an output schema, the tool has seven parameters and no annotations, so the description needs to provide context about when and how the operation behaves. It fails to explain session creation/reuse, persistence, timeouts, or the relationship to sibling navigation tools.

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?

With 0% schema description coverage, the description must compensate, but it only clarifies 'public URL' for the url parameter and 'named' for session. The other five parameters (headed, browser, max_chars, persistent, timeout_seconds) receive no semantic explanation in either the schema or the description.

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 ('Open') and identifies the resource ('a public URL in a named Playwright CLI session'), making its core function clear. However, it does not distinguish itself from the sibling playwright_cli_goto, which likely performs a similar navigation.

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 instead of playwright_cli_goto, playwright_cli_action, or web_scrape. The phrase 'public URL' implies a constraint, but there is no explicit context, exclusions, or alternative recommendations.

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