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

With no annotations, the description carries the behavioral burden and adds genuine value: it discloses the regulatory stance that any game with a stake or paid prize is CLOSED, which directly affects tool choice and expectations. It clearly signals an informational index rather than a mutating action.

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 compact and front-loaded with the index purpose, followed by a useful status clarification. It loses a point because the first sentence is slightly awkwardly phrased ('with the tool for each'), though it contains no 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?

For a zero-parameter index with no output schema, the description is largely complete: it tells the agent what is returned (games, statuses, tool mappings) and the key closure policy. It would be more complete if it defined possible status values, but it is sufficient for correct invocation.

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 there is no parameter behavior for the description to explain. Per the baseline for 0-parameter tools, the description does not need to compensate for missing schema detail.

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 states the resource (games) and what the tool provides: an index of games with their status and the tool for each. This makes its role clear and distinct from a generic action, though it does not explicitly differentiate it from siblings like onchain_games.

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?

It implies the agent should use this tool when it needs an overview of games, their statuses, and which tool applies to each. However, it never states when not to use it or names alternative discovery tools, so the usage guidance is contextual but not explicit.

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