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

Annotations already declare readOnlyHint=true and openWorldHint=false, so the safety profile is covered; the description usefully reinforces it with 'Nothing is consumed'. More importantly, it discloses a behavioural detail not in the annotations: without a token you get a random AI-run nation's board rather than an error, which changes how an agent should interpret the response. It still does not say whether the sampled turn advances state or how large a default payload is beyond the schema note.

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 short sentences, with the core payload description front-loaded before the usage note. No filler, though the compressed phrasing 'A real observation + schema from the live board' takes a moment to parse and could be stated more plainly.

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?

There is no output schema, so the description must carry the return-value burden, and it does: it names the two components (observation and orders schema), their approximate size, and the effect of the 'near' board on result length. For a three-parameter, zero-required, read-only sampling tool this is nearly sufficient; only the exact shape of the observation is left unstated.

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 coverage is 67%, and the description compensates for the undocumented token parameter by explaining its effect: a token yields your own nation, absence yields a random AI-run nation. The includeSchema size note ('about 20 KB') and the 'much shorter board' hint for 'near' also add practical meaning beyond the enum values, though those two are already partly documented in the schema.

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 and result: it returns a real observation plus the orders schema from the live board, scoped to your own nation or a random AI-run one. That is far more informative than the title 'Sample a turn (test grounds)'. It does not explicitly contrast itself with near-neighbours like my_nation or briefing, so the sibling differentiation is only implicit.

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?

'Use it to test your decision logic' gives a clear when-to-use context, and 'Nothing is consumed' reassures the agent it can be called freely. It does not say when NOT to use it, nor does it point to validate_orders or submit_orders as the downstream alternative once testing is done, so the routing guidance is incomplete.

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