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

With no annotations provided, the description carries the full behavioral burden. It does disclose useful counting semantics, including that visits count once per person per day and owners do not count themselves, but it does not describe return format, limits, ordering, or whether the operation is purely read-only.

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 compact and front-loaded, beginning with 'The leaderboard' before listing the ranked entities. Every sentence adds useful information about scope or visit-counting semantics.

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-style popularity tool with one optional parameter and no output schema, the description covers the main returned categories and the key counting rule. It does not specify response shape, ordering, or pagination, but those gaps are relatively minor for this complexity level.

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 explain the single optional period parameter. It does so by indicating the default weekly scope and the '"all"' period value, though it does not explicitly state the 'week' enum value or the default behavior in formal terms.

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 the resource as a leaderboard and names the ranked entities: buildings by unique visits, most viewed projects, and newest residents. It is specific enough to distinguish from generic stats, but it does not explicitly contrast itself with sibling tools such as get_stats or list_projects.

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 implies that this tool is for popularity rankings, but it gives no explicit guidance on when to use it versus alternatives such as get_stats or list_projects. It also does not state exclusions or prerequisites for use.

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