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

No annotations are provided, so the description carries the full burden; it does disclose meaningful traits — free/no payment, read-only listing semantics implied by 'list', output pinned to IPFS and anchored on Base L2, and consensus-driven tournament parameters. It stops short of stating auth requirements or rate limits, but covers more than the bare minimum.

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 purpose and the alternative route are front-loaded and the size is reasonable for the tool's scope. Some promotional padding ('invention #5053', the expanded DATO backronym) is not strictly needed for an agent to call the tool, costing a point.

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 zero parameters and an output schema present, the description does not need to explain return values, and it supplies the purpose, cost model, and sibling routing. Coverage is close to complete; only explicit read-only/auth/rate-limit framing is 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?

The tool takes zero parameters, so the baseline is 4 and there is no schema-level parameter detail to complement. The only argument mention (tid) belongs to the sibling tool, so the description adds nothing parameter-wise nor is anything required.

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 resource ('list tournaments') and adds the distinctive mechanism (AI captains vote round parameters by distributed consensus, records pinned to IPFS/Base L2). It also names the sibling it is not — aiarena_dato_detail — so an agent can distinguish the two without opening either schema.

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 routes the agent to aiarena_dato_detail(tid) for a single tournament's ballot and proofs, and flags 'No payment required' / '[FREE]', which tells the agent this call is safe to make without a payment step. The only gap is that it does not state an explicit when-not condition beyond the single-vs-list split.

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