navigate

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

With no annotations available, the description carries the full burden of behavioral disclosure. It reveals important behavior: automatic protocol prefixing, waiting for the initial HTML document, and that the page becomes part of browser history. It doesn't mention failure/timeout behavior, but the key execution traits are well covered.

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 well-structured with clear sections (summary, behavior, Args, Returns, Tool selection). Every sentence adds value, and the most important usage distinction is front-loaded. It is detailed without being redundant.

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 single-parameter tool with no annotations and an output schema, this description is complete: it covers purpose, when to use it, parameter semantics, key behavioral quirks, return value, and alternatives. Nothing crucial is missing for an agent to invoke it correctly.

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 0%, but the description fully compensates with an explicit Args section explaining that url may be a complete URL or a bare hostname, with examples. It also explains the URL normalization behavior, so the agent understands how the parameter is interpreted.

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-resource pair: 'Navigate the current browser tab to a URL.' It clearly distinguishes itself from history-related operations like back/forward/reload by naming the alternative tool (manage_history) and the exact condition for choosing navigate ('Go to a new URL').

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 'Tool selection' section explicitly states when to use navigate (new URL) versus manage_history actions for back, forward, and reload. The opening also contrasts navigate with 'its existing back/forward history,' providing a clear decision boundary for the agent.

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