navigate_to

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

With no annotations, the description carries the full behavioral burden. It discloses the prerequisite that the browser must be launched first and implies the current page is changed, but it omits side effects such as whether navigation replaces the current page, error handling, and return behavior. The waitUntil parameter is documented only in the schema, not the description.

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 three short sentences, front-loads the core action, and contains no redundant or filler content. Every sentence contributes to understanding the tool's purpose or prerequisite.

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 simple navigation tool with a fully documented schema, the description covers the core action and the key prerequisite. It lacks details about return values and failure modes, but those are minor gaps given the tool's straightforward nature.

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 description coverage is 100%, so the schema already fully documents url, sessionId, and waitUntil. The description adds no parameter-level details beyond what the schema provides, so the baseline score of 3 applies.

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 states a specific verb and resource: 'Navigate to a URL in the browser.' It also clarifies the action with 'open web pages or refresh the current page' and distinguishes itself from the sibling launch_browser by requiring it first.

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?

It gives clear context for when to use the tool (opening web pages, refreshing the current page) and a prerequisite (browser must be launched first using launch_browser). However, it does not explicitly state when not to use it or name alternative tools beyond the launch prerequisite.

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