browser_close

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

The annotations already declare destructiveHint=true and readOnlyHint=false, so the description adds no additional behavioral context. It does not mention irreversible effects, session implications, or what happens to the page content. Since the annotation carries the safety profile, the description contributes nothing beyond that.

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 exactly two words—'Close the page'—which is maximally concise and front-loaded. There is no wasted text, and it immediately conveys the core action.

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 simple destructive operation with no parameters and no output schema, the description is mostly adequate. However, it does not clarify whether 'page' means the current tab or the entire browser, and it omits any mention of side effects like unsaved changes being lost. Given the annotation title says 'Close browser,' there is slight ambiguity, but the description is not severely deficient.

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, and schema description coverage is 100% (vacuously). With no parameters to explain, the baseline for this dimension is 4, and the description correctly omits any parameter details.

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 phrase 'Close the page' clearly identifies the action (close) and resource (page), distinguishing it from the sibling tools like navigate, click, or hover. It is specific enough to convey the operation, though it doesn't explicitly differentiate from a hypothetical 'close browser' tool.

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 alternatives, nor are any exclusions or prerequisites mentioned. The description merely states what it does without any contextual instruction for an agent.

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