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

The description mentions billing per call (1 credit), which is a behavioral trait. However, with no annotations, it fails to disclose whether this is a read-only operation, what data it returns, or if there are side effects. The schema hints at validation (challenge_id or challenge_name cannot be empty) but that is not in the description.

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 extremely short, but this is not conciseness—it is under-specification. The only useful information is the billing note; the core purpose statement is redundant. There is no structural organization or front-loading of essential details.

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?

Given the tool has two parameters, no annotations, and no output schema, the description is grossly incomplete. It fails to explain what challenge info is returned, how to combine the parameters, expected output, or any constraints. The billing and group labels do not make the tool usable.

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 description provides no explanation of the parameters challenge_id and challenge_name. The schema has a partial description for challenge_id, but the description itself adds nothing. With 50% schema coverage, the description should compensate, but it does not.

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 'get challenge info' is a direct restatement of the tool name and title, providing no specific verb-resource detail or differentiation from the many sibling get_* tools. The added 'Group: Challenge(hashTag)' offers only a category label, not a clear purpose.

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 no guidance on when to use this tool versus alternatives like get_challengePosts or get_challengeSearch. The description omits any context about use cases, prerequisites, or situations where this tool is appropriate.

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