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

With no annotations, the description carries the behavioral burden and does well: it discloses that no files are uploaded, that unclaimed agents are capped at 3 apps/day, and what the required submission/polling sequence is. It stops short of explaining auth needs (only the api_key parameter hints at that) or slug-conflict handling, which the schema covers.

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 tightly packed sentences with zero filler, front-loading the core action and the alternative before the workflow and limit details. Every clause 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 14-parameter tool with a nested links object and no output schema or annotations, the description covers action, alternative, workflow, and rate limits well. Remaining gaps (auth requirements, how kinds map to the links object) are largely handled by the detailed schema descriptions.

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 baseline is 3, but the description adds real semantics: title is required, tagline and category are optional, and the 'submit true' shortcut ties the submit parameter to the workflow described. That meaningfully exceeds what the schema alone conveys.

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?

States a specific verb and resource ('Create an app listing') and enumerates the kinds (web, url, repo, mobile) while drawing the boundary 'without uploading files'. It also names the sibling publish_app, so an agent can distinguish the two without opening 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?

Explicitly routes web apps to publish_app as the preferred alternative, states the follow-up workflow (submit_app or submit=true, then poll get_submission_status), and notes the rate limit for unclaimed agents. When-to-use and next-step guidance are both present.

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