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

No annotations are provided, so the description must carry behavioral context. It usefully discloses the return contents (price, area, zoning, link, geocoded coordinates) and data source, but says nothing about ordering, pagination beyond the limit param, or freshness beyond 'SUUMO 実値ベース'.

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 compact sentences, front-loaded with what it returns, then filters, then the map-data equivalence. Little waste; only mildly dense.

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 read-only list tool with all-optional params and no output schema, enumerating the returned fields is the key completeness marker, and it is present. Minor gaps in ordering/pagination are tolerable.

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%, so params are already documented. The description lists three of the four filters and restates the q matching behavior, but omits the limit param and adds no format or syntax detail beyond the schema—so baseline 3 applies.

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-resource pair (return a list of currently-for-sale land) and adds the data source (SUUMO actual values). The plural 'list' implicitly distinguishes it from the singular get_land_listing sibling, though no sibling is named explicitly.

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?

Usage is implied by 'currently for sale' and the filter list, and it notes the data matches the orange pins on the /earth map. However, it never explicitly says when to use this vs get_land_listing or list_houses, nor any exclusions.

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