Close bridge-created Chrome tab

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

Without annotations, the description discloses a key behavioral constraint: it only closes tabs created by the bridge in the current session. However, it does not disclose what happens if the tab is not bridge-created, error behaviors, or side effects such as whether the tab is permanently closed.

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 15 words, front-loaded with the action and condition. It is concise with no redundant 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?

For a simple one-parameter tool, the description covers the core purpose and the key condition. However, it lacks details on return values, error handling, and how to determine tabId, making it moderately complete but with clear gaps.

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?

Schema coverage is 0%; the description does not mention the tabId parameter or explain what it represents or how to obtain it. While tabId is somewhat self-explanatory, the description adds no meaning beyond the schema, which is insufficient given the low coverage.

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 identifies the resource 'tab' with a clear scope: 'only when it was created by Chrome Agent Bridge in the current extension session.' This clearly distinguishes it from sibling tools like open, activate, or navigate.

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 phrase 'only when it was created by Chrome Agent Bridge in the current extension session' provides a clear condition for when to use this tool. However, it does not explicitly mention alternatives or exclusions beyond this condition.

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