close_browser

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

With no annotations, the description carries full responsibility for behavioral disclosure. 'Close and quit' clearly indicates the browser session is being terminated, but it does not disclose consequences such as all tabs/windows closing, session state loss, or whether the browser process is fully quit. The core behavior is stated, but side effects remain implicit.

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 a single short sentence with no filler. Every word contributes meaning, and the action is front-loaded. It is concise without sacrificing clarity.

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, no-output-schema tool, the description provides adequate basic context: the tool closes and quits the browser session. It could be richer by explicitly contrasting with close_current_tab or warning about the irreversible termination, but the simplicity of the operation lowers the required burden.

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 tool has zero parameters, so there is nothing for the description to explain. The schema already documents an empty properties object with 100% coverage, and the description appropriately avoids inventing parameter details.

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 clear verb pair ('Close and quit') and identifies the resource ('browser session'). It implicitly distinguishes from sibling tools like close_current_tab by referring to the whole session, but it does not explicitly differentiate itself from those alternatives.

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?

Usage context is implied by the phrase 'browser session' versus sibling close_current_tab, but the description provides no explicit when-to-use guidance, no mention of when not to use it, and no reference to alternatives. An agent must infer that this ends the entire session rather than a single tab.

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