browser_type

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, but it only restates the action and tab targeting. It does not mention whether existing text is replaced or appended, whether the field must be visible or focused, or any side effects of the submit option.

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?

Two short sentences with no filler. The first sentence states the primary action, and the second adds the tab-targeting capability, so every sentence 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?

The schema fully describes all six parameters, which helps, but the description alone leaves gaps around usage versus sibling tools and behavioral side effects. For a tool with no annotations and no output schema, this is adequate but not 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 description coverage is 100%, so the baseline of 3 applies. The description adds little semantic value beyond the schema; mentioning 'input element' only reinforces ref's purpose, and tabId behavior is already documented in 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 names a specific action (type text) and a clear target (an input element), so the core purpose is unambiguous. It does not explicitly distinguish itself from siblings like browser_fill_form or browser_press_key, though the action is fairly self-contained.

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?

No guidance is given about when to choose browser_type over alternatives such as browser_fill_form or browser_press_key. The only contextual note is tab targeting, which is a capability rather than a usage rule.

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