browser.close_session

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

Annotations already indicate destructiveHint=true. The description adds that it finalizes trace/artifacts, which is beyond annotations. However, it does not detail what 'finalize' entails or mention irreversibility. Adds moderate context but lacks richness.

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 concise sentence (10 words), front-loaded with the core action. It is efficient, though adding more detail without becoming verbose would improve it.

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 destructive action with 1 parameter and no output schema, the description is too brief. It omits return value, side effects beyond trace finalization, and any safety warnings. Incomplete for safe and correct usage.

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 documentation coverage is 0% (no title or description for the parameter in the description field of the schema, only a title and constraints). The description does not explain the session_id parameter at all, leaving the agent without context beyond the schema's title and constraints.

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 clearly states the action ('close a session') and the resource ('session'), and adds additional effect ('finalize its trace/artifacts'). It distinguishes from siblings like browser.close_tab and browser.create_session.

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 provides no guidance on when to use this tool vs alternatives. It does not mention prerequisites (e.g., session must exist) or contrast with browser.close_tab. No explicit when-to-use or when-not-to-use information.

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