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

With no annotations, the description carries the behavioral burden. It usefully discloses that the search accepts names in any language and that date affects the UTC offset for the relevant historical period. However, it does not mention behavior around limit, language selection, or ambiguous/missing matches.

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 description is two tight sentences with no filler: the main purpose and examples come first, and the date nuance follows. It earns its length, though it could have used the space to clarify lang and limit without becoming verbose.

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?

The tool is simple and has an output schema, so return-value details are not required. The main call path is clear and defaults make basic invocation safe, but the lack of guidance for lang and limit, plus the absence of any annotation, leaves the description minimally viable rather than fully complete.

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 0%, so the description must compensate. It explains date explicitly and makes query semantics clear through the main purpose, but lang and limit receive no explanation at all, leaving an agent to guess their exact roles.

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 clearly identifies a specific function: mapping a place name in any language to a geonameid for calculations, with concrete examples (Koln, Leningrad). It is not a tautology and no sibling appears to be a place geocoder, though it does not explicitly contrast with any sibling.

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 provides clear context: use this when you need a geonameid from a place name and, optionally, the historical UTC offset via date. It does not state exclusions or alternatives, but the context is sufficient for a straightforward lookup tool.

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