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. It reveals that the tool returns an ARIA snapshot and auto-creates a session if none exists, which are important behaviors. However, it does not disclose potential side effects like session state changes, error handling, or requirements (e.g., authentication). It adds value but is not comprehensive.

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 very concise with three short sentences. The first sentence immediately states the core action, followed by the return value and session behavior. Every sentence adds necessary information without extraneous detail.

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 there is an output schema (not shown), the description appropriately simplifies return info. It covers URL navigation, return snapshot, and session auto-creation. However, it lacks context on error cases, performance, or how session_id interacts with the auto-creation. It is largely complete for a simple navigation tool.

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, so the description must compensate. It implicitly describes the 'url' parameter by stating 'Navigate to a URL', but it provides no information about the 'session_id' parameter. The description does not add sufficient meaning beyond the schema for either parameter.

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 'Navigate to a URL', which is a specific verb and resource. It also mentions the return value (ARIA snapshot) and auto-creation of sessions, adding clarity beyond just the tool name. This distinguishes it from sibling navigate tools like 'browser_navigate_back' or 'browser_navigate_forward'.

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 does not provide explicit guidance on when to use this tool versus alternatives. It does not mention when not to use it, nor does it reference related tools like browser_navigate_back or browser_reload. The only implicit guidance is the purpose, but no comparative advice is given.

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