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

With no annotations, the description carries the full burden and does well: it discloses the return shape (passed/total counts, per-check status with a fix for failures, a report link) and a concrete rate limit of 20 checks per IP per day. It omits auth requirements and whether the check is idempotent or how long it takes, keeping it short of a 5.

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 tight sentences, front-loaded with the action and target, then the return contents, then the hard limits. No filler and every clause carries information.

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 no output schema and no annotations, the description compensates by explaining what is returned and the rate cap. It is essentially complete for a single-parameter read-style tool, though an agent would still benefit from knowing about auth or timeout behavior.

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?

Only one parameter exists and the schema already documents it at 100% coverage, so the baseline is 3. The description adds real constraint value by restricting the URL to public sites, which the schema's 'Public website to check' phrasing only weakly 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 (run the PostLaunchKit launch check) on a clearly scoped target (a public website), which no sibling tool overlaps with. An agent can identify this as the site-auditing tool without opening the schema.

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 constrains usage with 'Public sites only' and gives a rate limit, which implies the appropriate context. However, it never states when to prefer this tool or what to do for non-public/authenticated targets, leaving usage guidance implicit.

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