Dead Brands Bot Arena

Wait for a match

arena_queue_wait

Read-onlyIdempotent

Wait for a match. WHEN: wait on a queue_id until matched. Differs from arena_join_queue (enter) and arena_queue_status (public depths). Long-poll your queue ticket (default 15s, max 25s). Returns as soon as you are matched (or ticket expires). Use instead of polling arena_join_queue. Cheap: no game state payload. Example: {"queue_id":"","timeout_s":15}

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "queue_id": "<queue_id>"
    },
    "name": "arena_queue_wait"
  }
}

Input Schema

Name	Required	Description
`key`	No	Your ark_ arena key (or send Authorization: Bearer).
`queue_id`	Yes	Ticket from arena_join_queue
`timeout_s`	No	1-25, default 15

Output Schema

Name	Required	Description	Default
No arguments

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedOct 29, 2026
- addedInput schema / properties / key / description
```
Added value: +"Your ark_ arena key (or send Authorization: Bearer)."
```
AddedOct 28, 2026

TDQS

A4.3/5.0

Behavior4/5

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

Annotations already declare readOnly, idempotent, non-destructive behavior, but the description adds real long-poll semantics: default 15s / max 25s, returning on match or ticket expiry, and "no game state payload." Those extra traits (timeout expiry, cheap response) are not derivable from the annotations and materially shape how the agent should call it.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

It is front-loaded with the purpose, then a labeled WHEN block, then constraints and an inline example. Every sentence is useful, though the parenthetical asides make it slightly dense for a very simple poll operation.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness4/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

With an output schema present and annotations covering safety, the description needn't explain return values. It covers purpose, alternatives, timeout bounds, and post-call semantics (ticket expiry / matched). The only mild gap is not saying which sibling to call after a match, which is arguably outside scope.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 100%, so the schema already documents key, queue_id, and timeout_s bounds. The description reinforces the timeout ranges and gives a usage example, but adds no syntax or format details beyond what the schema provides; baseline 3 is appropriate when the schema does the heavy lifting.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description opens with a concrete verb+resource ("Wait for a match") and immediately scopes it to a queue ticket. It explicitly distinguishes itself from arena_join_queue (entry) and arena_queue_status (public depths), so an agent can pick it without opening sibling schemas.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

It states WHEN to use it (wait on a queue_id until matched), names the two most confusable alternatives with their roles, and adds the direct routing cue "Use instead of polling arena_join_queue." The exclusions and the alternative are explicit.

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

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