browser_navigate

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

With no annotations provided, the description carries the full burden of behavioral disclosure. 'Navigate to a URL' implies a state change but does not disclose whether it waits for page load, handles redirects, or returns a success indicator. This is insufficient for a tool that modifies browser state, especially without 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, concise sentence with no wasted words. It fully captures the core action in a readable manner, earning top marks for brevity. No unnecessary details or repetition are present.

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 one-parameter tool, this description is minimally adequate. It tells the agent the fundamental action, but it omits behavioral context such as whether navigation is synchronous, what happens on error, or potential side effects. Given the lack of annotations and output schema, a bit more detail would improve completeness without bloating the description.

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 input schema already documents the 'url' parameter with a clear description, achieving 100% coverage. The tool description adds no extra semantic value beyond the schema, so the baseline of 3 applies. It could optionally provide format examples or constraints, but the schema handles the basics.

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 uses a specific verb and resource ('Navigate to a URL') that clearly indicates the tool's function. It does not explicitly differentiate from siblings like browser_go_back or browser_go_forward, but the direct URL target is distinct enough. It is clear and unambiguous, though it could mention that this is for direct URL navigation rather than history navigation.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention prerequisites (e.g., page load behavior) or exclusions (e.g., not for back/forward). The description simply states what it does, leaving the agent without context for choosing among sibling navigation tools.

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