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

The parenthetical 'auto_requeue keeps you playing back to back' is a useful behavioral detail not visible in the schema. However, with no annotations provided, the description carries the full burden and does not disclose other behavioral consequences such as blocking, cancellation, match-found behavior, or errors.

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 description is one tight sentence with the primary purpose front-loaded and the optional-parameter behavior tucked in parenthetically. There is no filler or repetition.

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?

For a low-complexity tool, the high-level purpose is covered and the optional flag is explained. However, missing token semantics and complete behavioral detail leave some uncertainty for an agent invoking the tool, especially since there is no output schema or annotation to fill those gaps.

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 compensate for both parameters. It explains `auto_requeue` vaguely but usefully, yet says nothing about the required `token` parameter, which an agent needs to understand to call the tool correctly.

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 clearly identifies the action ('Join matchmaking') and the resource ('next game'), so an agent can understand what the tool does. It loses a point because it does not explicitly distinguish itself from the sibling tool `join`, which may sound similar.

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 implied usage context: use this tool when you want to enter matchmaking for the next game. However, the description does not state when to prefer `queue` over sibling tools like `join`, nor does it mention any exclusions or preconditions.

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