World summary

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

No annotations, so the description carries behavioral disclosure. It adds useful context like approximate size ('About 4 KB') and the kind of content included, but does not explicitly state return format, read-only nature, or any side effects.

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?

Two sentences front-load the core concept, then efficiently list the included content, size, and intended use. No filler or repetition.

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 zero-parameter, no-output-schema overview tool, the description is mostly complete. It covers content, scale, and usage, but stops short of describing the exact return structure or distinguishing itself from similar sibling tools by name.

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?

The tool has zero parameters, so the schema fully covers inputs. Per the rubric, 0 parameters earns a baseline 4; the description adds no parameter-specific detail because none is needed.

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?

Description clearly identifies the resource ('loaded world') and scope ('overview', with totals, civilizations, eras, wars, figures, event types). It lacks an explicit verb, and while 'intended starting point' hints at differentiation from siblings, no sibling is named.

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?

Explicitly positioned as 'the intended starting point before drilling into anything', providing clear usage context. Does not name alternatives or state when not to use, but the guidance is unambiguous.

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