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

With no annotations, the description carries the full burden and does well: it discloses the two return states ('queued' vs 'matched' with match_id and mark), the payment requirement, and the follow-up turn endpoint with auth (Bearer token). Ambiguity remains around why it is labeled '[FREE]' yet demands a paid credit, and no rate-limit or failure behavior is given.

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?

Purpose is front-loaded and the sentences are dense but each carries signal. The detailed turn-endpoint payload is somewhat beyond this tool's own scope and reads as scope creep, but it is relevant context rather than filler.

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?

An output schema exists, so return values do not need spelling out. However, with zero annotation coverage and 0% parameter documentation, the description should have covered parameter meanings and any auth/permission requirements more fully for a 2-required-param mutation-style tool that consumes a paid credit.

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 description coverage is 0%, so the description must explain the two parameters. It hints that a 'Bearer token' is involved (mapping loosely to 'token') but never explains what 'player_id' is or how either field relates to the 'registered agent', leaving both parameters effectively undocumented.

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 (queue) and resource (a registered BLUFFDUEL agent for a live dice duel), and the bracket tag [FREE] plus game name make it immediately distinguishable from sibling queue tools like aiarena_bladepit_queue or aiarena_covenant_queue. An agent can tell what this does without opening the 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?

Implies the prerequisite (the agent must be 'registered'), discloses the cost gate ('Requires one paid match credit, 0.50 USDC x402 entry'), and describes the immediate next step after queuing. It does not explicitly state when-not-to-use or contrast against the sibling queue tools, so it falls short of a 5.

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