browser_tabs

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

No annotations are provided, so the description must fully disclose behavioral traits. It mentions the operations but does not describe side effects (e.g., what happens when closing a tab), prerequisites (e.g., whether a browser must be open), or any warnings. The transparency is insufficient.

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 concise with two sentences. The first sentence efficiently lists the main actions. The second adds a contextual note. However, it could be more structured (e.g., bullet points) to improve readability for an AI agent.

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 moderate complexity (6 parameters, no output schema), the description is incomplete. It fails to explain parameter dependencies (e.g., which params are needed for each operation) or return value format, leaving significant gaps for an agent to infer correctly.

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 has 6 parameters with 0% description coverage (no descriptions in schema). The tool description only implicitly references the 'operation' parameter via the listed actions. It does not explain the meaning or usage of 'url', 'tabId', 'browser', 'timeout', or 'waitForLoad', leaving the agent with little semantic guidance.

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 clearly states the tool's purpose: managing browser tabs/windows with specific operations (list, create, close, switch). It distinguishes from sibling tools like browser_navigate (navigation) and browser_click (interaction) by focusing on tab/window management.

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 includes a note about TestCafe managing windows instead of tabs, which provides some context but lacks explicit guidance on when to use this tool versus alternatives or which operation to apply in different scenarios. No clear when-to-use or when-not-to-use instructions.

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