tab

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

No annotations are provided, so the description carries the full burden. It mentions actions but does not disclose side effects (e.g., what happens to existing tabs on creating new ones), error conditions (e.g., invalid reference), or required permissions. The description is too brief to fully inform the agent about behavioral traits.

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?

Description is a single sentence with a concise list of actions. It is front-loaded with the main purpose and uses minimal words. While effective, it could be slightly more structured (e.g., separate lines) but overall it is efficient.

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 no output schema and no annotations, the description covers the actions but lacks details on return values, error handling, and prerequisites. For a tool with 4 parameters and multiple actions (list, create, rename, switch, close), it is moderately complete but leaves gaps about expected behavior.

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%, so each parameter is documented in the schema. The description adds minimal extra value: it reiterates the action enum and notes that reference is '3 descriptive words', which is also in the schema. Baseline 3 is appropriate; no significant enhancement over 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?

Description clearly states 'Manage browser tabs' and enumerates five specific actions (list, create, rename, switch, close) with brief explanations. This provides a clear verb+resource pairing and differentiates from sibling tools like 'navigate' or 'content' by focusing on tab management, though not explicitly distinguishing from them.

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 lists actions but provides no guidance on when to use this tool versus alternatives (e.g., 'navigate' for navigation, 'content' for DOM interaction). It does not specify prerequisites (e.g., must have browser connected) or when not to use certain actions. Usage context is implied but not explicit.

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