finalize

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

No annotations are provided, so the description carries full burden. It discloses that the tool cleans up session tabs and optionally keeps specific tabs with statuses 'deliverable' or 'handoff.' It does not disclose what happens to tabs not listed in 'keep' (presumably closed), whether the browser process terminates, or any confirmation/prompt behavior. It adds the key behavioral trait—tab cleanup with selective retention—but details on consequences are thin.

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, tight sentence that conveys purpose, scope, and the optional keep functionality in under 20 words. Zero waste. It front-loads the main action ('End browser work') before the supporting detail about keeping tabs open.

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 simple one-parameter tool with no output schema and full schema coverage, the description is adequate. However, it could clarify what happens to the browser session (is it destroyed? Can tabs be recovered after finalize?) and the meaning of the two status values ('deliverable' vs 'handoff') beyond the enum names. Given sibling tools like list_tabs and name_session exist, the description could benefit from explaining the relationship to session management.

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%, and the 'keep' parameter has a clear description: 'Array of { tab_id, status } to keep open.' The description reinforces this by mentioning keeping tabs open with statuses 'deliverable' or 'handoff,' which maps directly to the enum in the schema. Since the schema already fully documents the parameter and the description echoes it, baseline 3 is appropriate—the description adds minimal 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 clearly states the tool's purpose: 'End browser work for now, cleaning up session tabs.' The verb 'finalize' combined with 'End browser work' makes the function unambiguous. It adds the scoping detail of cleaning up tabs and optionally keeping specific ones, which distinguishes it from the many browser navigation siblings.

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 says this tool 'ends browser work for now,' which implies it should be used when wrapping up a browsing session. However, it doesn't explicitly say when NOT to use it or name alternatives—e.g., it doesn't contrast with name_session (for labeling) or list_tabs (for inspecting). The context of 'cleaning up session tabs' gives some situational guidance but no explicit exclusions.

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