Navigate Chrome 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 of disclosure. It discloses the allowed URL schemes and the 'existing tab' constraint, but does not explain what happens after navigation (e.g., whether it waits for page load, returns success/failure, or modifies tab navigation history). The description stays at the surface level, leaving key behavioral aspects undocumented.

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 with no redundant words. It front-loads the action ('Navigate') and immediately specifies the key constraints ('existing tab', URL schemes). Every word earns its place, making it highly concise and well-structured.

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 (2 params, no output schema, no annotations), the description should provide more context about return values, error conditions, and how tabId relates to other tools like browser_list_tabs. The mention of 'existing tab' gives some context, but the lack of operational details makes it incomplete for an agent to invoke the tool confidently without additional knowledge.

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?

With 0% schema description coverage, the description must compensate. It partially does by clarifying allowed URL schemes for the 'url' parameter, but the 'tabId' parameter is not explained at all—there is no guidance on how to obtain it or what it signifies. The description adds value for one parameter but leaves the other completely unaddressed.

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 the specific verb 'Navigate' and identifies the resource as an 'existing tab', clearly distinguishing it from sibling tools like browser_open_tab (new tab) or browser_activate_tab (focus). It also specifies allowed URL schemes (HTTP, HTTPS, file, about:blank), leaving no ambiguity about the tool's function.

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 'existing tab' implies that this tool is for navigating an already-open tab, not for opening new ones. However, it does not explicitly mention alternatives like browser_open_tab or browser_activate_tab, nor does it provide any exclusions or when-not-to-use guidance. The context is clear but entirely implied, so it meets the minimum viable level.

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