open_page

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

With no annotations, the description carries the full behavioral burden. It implies a read-only fetch and mentions a 'full page map' return, but says nothing about auth requirements, side effects, timeouts, or whether the fetch is headless or interactive. The 'public' qualifier hints at a restriction but is not explained.

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?

A single tight sentence with no filler, and the action is front-loaded before the return value. Nothing wasted, though there is very little content overall.

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 zero-parameter tool with no output schema, the description should clarify how the address is provided and what a 'page map' contains. Neither is addressed, leaving critical invocation details unstated.

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 parameters, which normally sets a baseline of 4. However, the description says 'Navigate to a public http or https address', implying a target URL input that does not exist in the empty schema, so the agent is left unclear on how the address is supplied.

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 gives a specific verb (navigate) plus resource (page) and adds the return behavior ('full page map'), which distinguishes it somewhat from the sibling 'navigate'. However, it never explains how it differs from 'navigate' or 'click', so an agent must infer the distinction.

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 when-to-use or when-not-to-use guidance, and no mention of the obvious alternatives in the sibling list ('navigate', 'download_file', 'page_report'). The description only says what it does, not when to reach for it.

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