navvi_open

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

No annotations are provided, so the description carries full burden. It only states 'navigate to a URL' without disclosing whether it waits for page load, handles errors, requires authentication, or changes the browser state. This is insufficient for a operation that affects shared browser state.

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 front-load the core action and provide a useful workflow hint. No redundant or irrelevant content.

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 that an output schema exists, the description could omit return details, but it still lacks guidance on what happens after navigation (e.g., page loaded event, error scenarios). It is adequate for simple cases but incomplete for robust agent use.

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 has 0% description coverage, and the description adds no explanation for either parameter. The required 'url' parameter is not specified as full/relative URL or accepted protocols, and the optional 'persona' parameter is not described at all.

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 navigates to a URL in the active browser, and distinguishes itself from interaction siblings like navvi_click and navvi_fill. However, it does not differentiate from similar navigation tools like navvi_browse or navvi_url, and the optional persona parameter is not explained.

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 provides a clear workflow: use navvi_open first, then navvi_find to locate elements, then navvi_click/navvi_fill to interact. This gives good sequential guidance, but it does not mention when not to use the tool or any prerequisites/context requirements.

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