browser_navigate

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

Annotations already declare destructiveHint=true and openWorldHint=true, so the agent knows navigation changes state. However, the description adds no extra behavioral context, such as whether the tool waits for page load, what happens on failure, or whether it operates on the current tab. The description merely restates the title and provides no value beyond the annotations.

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, front-loaded sentence that conveys the essential action without any waste. Every word earns its place, and there is no verbosity or unnecessary detail. This is an ideal length for such a simple tool.

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 low complexity (1 parameter, no output schema) and the presence of annotations, the description is minimally sufficient. However, it fails to mention whether the navigation is in the current tab, whether it waits for the page to load, or any side effects beyond the destructive hint. These are relevant contextual details that an agent might need to know, leaving a noticeable gap.

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 100% coverage with a single parameter 'url' described as 'The URL to navigate to'. The description adds nothing beyond what the schema already provides, so the baseline score of 3 applies. There is no additional semantic meaning offered.

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 'Navigate to a URL' clearly states the action (navigate) and the resource (a URL). It is specific and easy to understand, but it does not explicitly distinguish itself from sibling tool browser_navigate_back, which is a related but distinct action. Since the core purpose is unambiguous, it earns a 4 rather than a 5.

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 no guidance on when to use this tool versus alternatives. There is no mention of prerequisites, exclusions, or situations where browser_navigate_back or other browser tools might be more appropriate. The agent is left to infer usage solely from the tool name and generic description.

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