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

Annotations already establish readOnlyHint=true and openWorldHint=false, so the safety profile is covered. The description adds genuinely useful behavioral context: the puzzle is free, is consumed by one play, includes a commitment to its draw (fairness), and rules with any change announced in advance. It does not discuss rate limits, expiry, or error behavior.

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 definition is a single dense sentence with no filler, and the most important attribute (a fresh puzzle, played once) is front-loaded. It is slightly run-on due to the long enumeration of returned fields, but every clause carries information.

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 lists the key fields the puzzle provides. Combined with annotations covering safety, this is nearly complete, though it does not describe the shape or format of the token graph and commitment values.

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 there are no parameter semantics to explain; the baseline of 4 applies. The description does not attempt to add parameter meaning, which is appropriate.

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 states a specific resource and enumerates what the returned puzzle contains: id, token graph, start and target tokens, house baseline, draw commitment, and rules. The verb is implicit ('A fresh Routepot puzzle') and 'Routepot' is undefined jargon, so it is not fully self-explanatory, but the resource and payload are clear.

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?

There is no explicit when-to-use guidance or comparison to siblings such as play or get_result. The phrase 'played once' hints that this is a one-shot entry point, but the agent must infer that this should precede play; no exclusions or alternatives are named.

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