digit_reversal

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. The description only states what the tool does without any behavioral traits such as error handling (e.g., for negative numbers or non-integer inputs), performance characteristics, or output format. This leaves critical gaps for an agent to understand how the tool behaves beyond its basic function.

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 concise and front-loaded: 'Reverse the digits of a number.' This single sentence clearly conveys the core purpose without any wasted words. The additional domain and category information in parentheses is minimal and does not detract from clarity, making it efficiently structured.

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 complexity (a digital operation with potential edge cases), lack of annotations, no output schema, and poor parameter coverage, the description is incomplete. It does not address what the tool returns, how it handles inputs like negative numbers or zero, or any behavioral nuances, making it inadequate for reliable agent use.

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 input schema has 1 parameter with 0% description coverage, and the description adds no information about the parameter 'n'. It does not explain what 'n' represents (e.g., an integer whose digits will be reversed), valid ranges, or handling of edge cases. With low schema coverage, the description fails to compensate, leaving the parameter undocumented.

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 states the tool's purpose: 'Reverse the digits of a number.' It specifies the verb ('reverse') and resource ('digits of a number'), making the function unambiguous. However, it does not differentiate from siblings like 'digit_sort' or 'palindromic_numbers', which might involve similar digit manipulations, so it misses full sibling distinction.

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?

The description provides no guidance on when to use this tool versus alternatives. It mentions a domain ('arithmetic') and category ('digital_operations'), but this is too vague to inform usage decisions among the many sibling tools in similar categories. No explicit when/when-not or alternative tools are named.

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