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

Annotations already declare readOnly, idempotent, non-destructive, and open-world, so safety is covered. The description adds useful content-scope context by listing the data domains returned (BBR, valuation, zoning, flood, companies), which tells the agent this is a broad, heavy, multi-registry fetch rather than a narrow field lookup. It does not mention latency or cost, which would have pushed it higher.

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?

One sentence, front-loaded with the scope ('Everything about a Danish address') followed by a compact enumeration of contents. There is no filler and every clause names a distinct data domain.

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 a rich output schema and four annotations carrying the safety profile, the description only needs to convey scope, which it does thoroughly. The remaining gap is routing: it never states that address ids come from search_address or when a narrower sibling is preferable.

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 description coverage is 100% and the single 'address' parameter is documented there as an id from search_address or free text, so the schema does the heavy lifting. The description adds no meaning about the parameter beyond what is already structured, which is the baseline-3 case for a fully covered single-parameter tool.

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 names a concrete resource (a Danish address) and enumerates exactly what the tool surfaces: administrative areas, BBR building data, dwellings, property valuation, zoning, flood indicator, and registered companies. That is far more specific than a restated title, though it never explicitly contrasts itself with search_address or cleanse_address, so the sibling distinction is only implied.

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?

There is no when-to-use or when-not-to-use guidance in the description. The only routing hint (that the address can be an id from search_address) lives in the schema, not the description, so an agent gets no help deciding between this aggregate report and the lighter lookup siblings.

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