navigateTo

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

With no annotations, the description carries the full burden of behavioral disclosure. It adds the key trait that it reuses the browser instance, but omits important behaviors such as what happens if no browser is open, whether it uses the current tab, or possible error conditions. The description is too sparse to fully inform the agent.

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 two short sentences with zero filler. It is front-loaded with the primary action and includes only the most essential extra context (browser reuse). Every word earns its place.

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?

While the tool is simple (2 params, no output schema), the description lacks key behavioral and usage context. It does not explain what happens if no browser exists, whether a browser must be opened first, or how the waitUntil parameter affects behavior. Given the absence of annotations, the description is noticeably incomplete.

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 baseline is 3. The description adds no additional parameter details beyond what the schema already provides; it does not mention the waitUntil parameter or its default value. No extra value is added.

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 verb ('Navigate') and resource ('URL'), and the phrase 'Reuses browser instance' distinguishes it from sibling tools like openBrowser, which would create a new browser instance. This is specific and unambiguous.

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 phrase 'Reuses browser instance' implies that this tool is for navigating within an existing browser session rather than opening a new one, providing some contextual guidance. However, it does not explicitly state when to use it over alternatives like openBrowser, nor does it mention prerequisites such as having an open browser.

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