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

With no annotations provided, the description carries the full burden. It compensates partially by disclosing the return value ('artifact path') since no output schema exists, but fails to mention side effects, error states (e.g., calling without an active trace), or the nature/format of the artifact.

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?

Single sentence, 14 words, front-loaded with the action ('Finalize'). Zero waste; every word 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?

Given the simple single-parameter structure, the description covers the core action and return value adequately. However, gaps remain due to undocumented parameters and missing behavioral edge cases, making it minimally viable rather than comprehensive.

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 0% (no description field), and the description only implicitly references the parameter via 'active session' without explaining the session_id format, valid values, or how to obtain it. Insufficient compensation for the undocumented 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 finalizes a 'Playwright trace' and returns an 'artifact path', using specific verbs and resources. It distinguishes from sibling session management tools (create_session, close_session) by explicitly referencing 'trace' functionality.

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 provided on when to use this tool versus alternatives, nor prerequisites (e.g., that a trace must have been started first). The description assumes the agent knows what a trace is and when finalization is appropriate.

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