close_page

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

The description adds minimal transparency beyond the annotation readOnlyHint=false. It does not describe what happens if the index is invalid, whether the tab closes immediately, or if it triggers any dialogs.

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 one short sentence. It is efficient but could be slightly expanded to include helpful context without being verbose.

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 tool with one parameter and no output schema, the description is adequate but lacks completeness on error handling, return value, and edge cases (e.g., closing the last tab).

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 input schema fully describes the required parameter 'pageIdx' with a clear description. The description echoes 'by index' but adds no new meaning beyond 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 'Close tab by index' clearly states the action (close), the resource (tab), and the method (by index), distinguishing it from sibling tools like navigate_page or new_page.

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 usage guidelines are provided. The description does not indicate when to use this tool versus alternatives (e.g., accept_dialog or close the entire page), nor does it mention prerequisites or error cases.

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