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

The description discloses the key side-effect profile: it creates an inert draft, returns a claim URL, requires human sign-in and confirmation, publishes nothing, charges nothing, and is subject to human review. This goes well beyond the sparse annotations and tells the agent exactly what will and won't happen.

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?

Three sentences with no filler; the core action and workflow are front-loaded, and eligibility constraints are placed at the end. Every sentence 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?

For a human-in-the-loop submission tool, the description covers the draft state, claim URL, confirmation step, review process, cost, and refusal criteria. The presence of an output schema means return-value documentation is already handled elsewhere.

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 100%, so the schema already documents all eight parameters. The description adds non-obvious validation semantics for website_url by refusing free subdomain hosts and already-listed domains, which is meaningful 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 first sentence uses a specific verb and resource ('List a product on the SaaSCity launch directory') and clearly distinguishes this creation workflow from read-only siblings like get_listing and search_listings. The rest of the description reinforces that this is the submission action, not a status or search tool.

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 makes the submission context clear: it is the tool for creating a draft listing and requires human confirmation. It does not explicitly name alternatives like get_submission_status for follow-up checks, but the workflow is unambiguous enough that an agent would not confuse it with the read-only siblings.

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