navigate

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 behavioral disclosure. It states the action ('navigate') but doesn't explain what this entails—e.g., whether it opens a new page, changes the current view, requires network access, has side effects like loading resources, or what happens on failure. For a tool with zero annotation coverage, this is a significant gap in transparency.

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 extremely concise ('Navigate to a URL'), consisting of a single, front-loaded sentence with zero waste. It efficiently communicates the core purpose without unnecessary elaboration, earning full marks for brevity and clarity.

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 complexity of a navigation tool (which likely involves web interactions), lack of annotations, and no output schema, the description is insufficient. It doesn't cover behavioral aspects like error handling, return values, or dependencies, leaving the agent with incomplete context for effective 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?

Schema description coverage is 100%, with the single parameter 'url' documented as 'The URL to navigate to' in the schema. The description adds no additional meaning beyond this, such as URL format requirements, validation rules, or examples. Baseline 3 is appropriate when the schema does the heavy lifting.

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 action ('navigate') and target resource ('to a URL'), providing a specific verb+resource combination. However, it doesn't differentiate this tool from potential alternatives like 'get_url' or 'reload' among the sibling tools, which would require explicit comparison to achieve a score of 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 like 'get_url' (which might retrieve the current URL) or 'reload' (which might refresh the current page). There's no mention of prerequisites, context, or exclusions, leaving the agent with minimal usage direction.

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