activate_tab

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

No annotations are provided, so the description carries the full behavioral burden. It clearly discloses the effect: bringing the tab to the foreground and focusing its window, including the re-raise scenario. It does not discuss error cases or prerequisites, but for this simple focus operation the core behavior is transparent.

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?

Two concise sentences with no filler. The primary behavior is front-loaded, followed immediately by actionable usage guidance.

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?

The tool is simple and the description covers purpose and usage well, but it omits the meaning of the optional session_id parameter and any behavior when no session is provided. Since there are no annotations, this missing parameter context is a real gap, though the overall definition is still quite usable.

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 description coverage is 0%, and the description does not mention session_id at all. Although the parameter name and title give some hint, the description fails to explain how session_id identifies the tab or what passing null/default means, so the agent is left to infer this from context.

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 states a specific verb and resource: 'Bring a tab to the foreground and focus its window.' It also differentiates the tool from switch_tab by explaining that activation is for foreground work or re-raising a tab the user clicked away from.

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 explicitly says when to use this tool: after switch_tab when foreground work is required, or to re-raise a tab. This gives an agent a clear decision rule and implicitly identifies switch_tab as the alternative for non-foreground tab changes.

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