browser_close

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

The description mentions that it closes the browser and releases resources, which is the core behavior. However, it does not disclose potential side effects like discarding unsaved state or whether it can be called multiple times. With no annotations, the burden is on the description, and it is adequate but could be more informative.

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 sentence of six words, front-loaded with the verb 'Close'. Every word is necessary and there is no extraneous content.

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 that an output schema exists and there are no parameters, the description is largely complete. It covers the primary function, though it could mention prerequisites like the browser being open or whether it errors if already closed.

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?

There are no parameters, so the description does not need to add parameter information. With 0 parameters, the baseline is 4, and the description does not repeat anything from the 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 resource 'browser', clearly stating the action. It effectively distinguishes from sibling tools like browser_navigate or browser_click by indicating a teardown operation.

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 implies usage when the browser session is complete, but it does not explicitly state when to use or when not to use this tool versus alternatives. No exclusions or context are provided.

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