navigate

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

With no annotations, the description carries the burden of behavior disclosure. It adds the key behavioral trait of tab reuse ('reuses the tab — no tab spam') and the newTab switch. However, it does not disclose side effects like losing current page state or history, page load behavior, or potential errors. It is informative but not comprehensive.

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 short sentences front-load the primary action and the critical behavioral distinction. The 'no tab spam' parenthetical adds motivation without bloat. The visible truncation prevents a perfect score, but the structure is appropriately compact and effective.

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?

For a 2-parameter tool with no output schema and no annotations, the description covers the core action and the optional new-tab behavior. It omits details that an agent may need, such as whether the tool waits for page load, what it returns, and any side effects on the current page or browser history. Adequate but with clear gaps.

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 schema only documents newTab (50% coverage), and the description reiterates that url is the navigation destination and makes newTab's behavior explicit. But it adds little about the url parameter beyond its literal name and does not specify URL format constraints. The description partially compensates for the schema gap but not fully.

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?

States a specific verb ('Navigate') and a specific resource ('the CURRENT tab to a URL'), and explicitly contrasts with opening a fresh tab via newTab:true. The phrasing clearly differentiates this from sibling tools like tabs or explore_page by focusing on direct URL navigation in the current 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?

Provides clear context by establishing the default behavior (reuses the current tab) and the alternative (newTab:true opens a fresh tab). While it gives conditional guidance for the newTab parameter, it does not explicitly mention when to prefer this tool over siblings such as explore_page or tabs.

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