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

With no annotations, the description carries the full behavioral burden. It usefully discloses the scoring rule (first solver earns 3 points, others earn 1), but it omits important traits such as what happens on an incorrect answer, whether resubmission is allowed, and what the optional secret changes behaviorally.

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 two compact sentences with zero waste. The core action is front-loaded, and the scoring rule follows naturally.

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 simple three-parameter mutation tool, the description covers the action and scoring outcome. However, with no annotations and no output schema, it leaves gaps around error behavior, secret handling, and submission constraints that an agent would need before invoking confidently.

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 coverage is moderate at 67%: name and secret are documented in the schema, while answer has no description anywhere. The description confirms the tool is about submitting an answer but adds no format, validation, or matching semantics for the answer parameter.

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 a specific action and resource: answering today's puzzle. It does not explicitly distinguish this from nearby siblings such as challenge or riddle, so it is clear but lacks sibling differentiation.

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?

Usage is only implied: an agent should use this to submit an answer to the current puzzle. There is no explicit guidance on when not to use it, whether multiple submissions are allowed, or how it differs from related puzzle tools.

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