close_page

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

No annotations provided, so description must convey behavioral traits. It omits whether closing is irreversible, requires confirmation, or affects other tabs. For a destructive action, this lack of transparency is a critical gap.

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 (one sentence) with no wasted words. However, it is so brief that it borders on under-specification, lacking any structure or additional context.

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 the tool's simplicity (one param, no output schema), the description is minimally adequate. However, it misses important context like side effects (e.g., unsaved data loss), error scenarios, or behavior when index is out of range.

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 100% with the single parameter 'pageIdx' described as 'Tab index to close'. The description adds 'by index' which aligns with the schema but provides no extra meaning beyond what the schema already states.

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) and resource (tab by index). It differentiates from siblings like 'new_page' (open) and 'select_page' (switch). However, it could be more explicit that it closes a specific browser tab.

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 on when to use this tool versus alternatives like 'navigate_page' or 'list_pages'. Missing context about prerequisites (e.g., tab must exist) or when not to use (e.g., closing the last tab).

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