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

The readOnlyHint annotation already communicates safety, and the description adds behavioral value by explaining what the list reveals: available language versions, XML/PDF manifestations, and whether a version is PDF-only. No contradictions or undisclosed side effects are apparent.

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?

The core purpose is front-loaded in one efficient sentence, followed by a practical usage hint. The stray trailing 'norm.' is minor noise that prevents a perfect score, but overall there is no wasted explanation.

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 simple read-only, one-parameter tool with no output schema, the description supplies enough context: it names what is returned, the scope, and the use-before-reading workflow. It could be slightly richer about the return shape, but the current level is adequate.

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 parameter eli_version is already described with a clear pattern. The description only restates 'one consolidation' without adding format details or edge-case guidance beyond the schema, so it stays at the baseline.

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 begins with a clear action ('List') and exactly specifies the resource ('language versions and manifestations (XML, PDF) of one consolidation'). Scoping to a single consolidation distinguishes it from broader sibling tools like fedlex.list_versions, even without naming them.

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 phrase 'use before reading' gives an explicit when-to-use signal tied to a concrete decision: checking whether a Fassung is PDF-only. It does not name alternatives or when-not-to-use conditions, which keeps it just below a 5.

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