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

Annotations already mark this as destructive and non-read-only, and the description reinforces that by saying 'publish or replace'. It clarifies that an existing public page may be overwritten, which is useful behavioral context beyond the generic destructiveHint. It does not detail confirmation_token or idempotency behavior, but the annotation coverage lowers the burden.

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, front-loaded with the action, and no filler. It conveys the core operation and the public URL context efficiently. Conciseness is not conflated with underspecification; it is appropriately sized for the information it supplies.

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?

With 4 parameters, 0% schema description coverage, a destructive profile, and no explanation of idempotency_key or confirmation_token, the description is not sufficient for an agent to correctly call this tool. The output schema helps with return values but does not solve invocation semantics.

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 ０%, so the description must compensate, but it only hints at 'selected landing page' for landing_project_id. The required project_id, idempotency_key, and confirmation_token remain semantically unexplained, leaving an agent without parameter-level guidance.

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 states a specific action ('publish or replace') applied to a specific resource ('selected landing page') and a clear destination ('public SparkLaunch URL'). This distinguishes it from sibling tools like landing.create_project or landing.generate_content without needing to inspect schemas.

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 gives no guidance on when to use this tool versus alternatives, nor does it mention prerequisites, exclusions, or conditions. The word 'selected' implies a preceding selection step, but no explicit usage context is provided.

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