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

Annotations only declare readOnlyHint=false and openWorldHint=true; the description adds the crucial behavioral facts that this costs $0.10 per play, resolves immediately, and that payout depends on route quality with rules-defined multiples and rake. It does not spell out irreversibility or failure/deduction behavior, keeping it short of a 5.

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 tight sentences with the cost and payoff front-loaded and no filler. The phrasing 'learn at once whether it won a multiple of the entry' is slightly dense but still readable.

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?

With no output schema, the description does say the agent learns immediately whether the play won, but it omits the shape of that result (payout amount, win/loss fields) and how failures are reported. For a paid, state-changing, open-world action, some return-value detail is still missing.

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 100%, so both parameters are already documented, and the description largely restates that the path runs from start to target. It adds only the qualitative signal that a better route improves odds, which is marginal beyond the schema baseline.

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 concrete verb and resource (play a Routepot puzzle) plus the entry cost ($0.10) and the core mechanic of submitting a route from start to target token. It is distinguishable from get_puzzle/get_result by being the paid action, though it never explicitly contrasts itself with them.

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 only implied: the agent must infer that a puzzle id comes from get_puzzle and that results come from get_result. The description references 'each puzzle's rules' for multiples, odds and rake but gives no explicit when-to-play vs when-to-fetch guidance or exclusions.

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