navigate

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

No annotations are provided, so the description must carry the behavioral disclosure burden. It clearly states the mutating action and explains wait_for_load and the url_pattern matching semantics. However, it does not disclose failure behavior, side effects on the current document, or whether navigation can be cancelled.

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 compact and front-loaded with the core behavior, followed by a concise parameter list. It earns its space, though the url_pattern line could be more explicit about how the regex affects navigation.

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 four-parameter navigation tool with no annotations even though an output schema exists, the description covers the main behavior and parameter semantics. It lacks guidance on how tab_id relates to url_pattern or how to obtain a valid tab_id, which an agent would likely need when selecting the 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?

Schema description coverage is 0%, so the description fully compensates by explaining each parameter in plain terms. It clarifies that url is absolute, tab_id must be exact, url_pattern matches the current URL, and wait_for_load controls waiting. The role of url_pattern is slightly ambiguous but still adds meaning beyond the bare schema.

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 states a specific action ('Point an existing tab at a new URL') with a clear resource and scope. 'Existing tab' differentiates this from sibling open_tab, which creates a new tab.

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 'existing tab' implies the tool is for navigating an already-open tab, but it does not explicitly mention when to use it instead of open_tab, activate_tab, or read_tab. No alternatives or exclusions are named, so usage guidance is only implied.

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