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

With no annotations, the description carries the full burden and does so well: it discloses SSRF-style scoping (only public addresses), a bounded redirect budget (max 5 hops), and that page content is never fetched, which signals a safe, read-only operation. It omits auth requirements, rate limits, and failure/timeout behavior, keeping it from 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?

A single, front-loaded sentence that opens with the action before layering on constraints and the rating output. Dense but every clause (hops, public-only, no content download, evaluation criteria, result tiers) carries information; a split into two sentences would read slightly better.

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?

There is no output schema, and the description compensates by naming the three result levels (unauffaellig, verdaechtig, gefaehrlich) and the signals used to derive them. For a one-parameter tool with no annotations this is nearly complete, with only error handling and timing left unexplained.

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% and the single url parameter is fully documented with an example, so the baseline is 3. The description adds only one parameter-relevant nuance – that only public addresses are accepted – which is useful but minor.

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: it follows a link's redirect chain hop by hop via HEAD requests and assesses start and destination. The parenthetical 'Seiteninhalt wird nie geladen' implicitly separates it from webseite_pruefen, but no sibling is named explicitly, so it falls just short of full sibling differentiation.

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 purpose strongly implies the use case (vetting a suspicious link before trusting it), but there is no explicit when-to-use statement, no when-not-to-use, and no named alternative such as webseite_pruefen or dns_check. Usage must be inferred.

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