navigate

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

No annotations are provided, so the description carries the full burden. It discloses that the tool waits for the 'load' event with a 45-second cap, which is critical behavioral context regarding potential blocking and timeout. It does not mention side effects like changing page state or requiring authentication, but for a navigation tool, the wait behavior is the most important operational detail.

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 concise sentences, with the core action front-loaded and the key operational detail (waiting behavior) included efficiently. There is no redundant information, and every word adds value.

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 its simplicity (2 parameters, no output schema, no nested objects), the description covers the essential aspects: what it does, the special values for 'url', and the blocking behavior. It could mention whether it returns anything or handles errors, but for a straightforward navigation tool, the description is largely complete.

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 coverage is 50%: the schema describes 'tabId' but leaves 'url' undocumented. The description clarifies that 'url' can be a URL string or the special values 'back'/'forward', which is essential semantic information not present in the schema. It also implies the use of tabId with 'tabs_context', adding context beyond the 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 the specific verb 'navigate' and the resource (a tab), and clearly defines its scope: navigating to a URL or using 'back'/'forward'. This distinguishes it from sibling tools like 'click' or 'scroll', which perform different actions on the current page.

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 implies usage by specifying the action types (URL, back, forward) and notes the waiting behavior, which is a key operational context. It does not explicitly list exclusions or alternatives, but the navigation action is inherently distinct from other tools, so the guidance is clear enough.

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