rot13

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

No annotations provided, so the description bears full burden. It notes self-inverse behavior and JSON return, but lacks details on case handling, non-alphabetic characters, or potential edge cases. Barely adequate.

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?

Extremely concise—three lines with clear purpose, argument doc, and return description. No fluff; front-loaded with the core action.

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 low complexity and presence of an output schema, the description adequately covers input, operation, and output. However, it lacks notes on typical usage, character set, or limitations, but is complete enough for a straightforward cipher.

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 0%, but the description defines 'text' as 'Text to encode/decode', adding functional meaning beyond the schema's type-only definition. For a single simple parameter, this is sufficient.

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 'Apply ROT13 cipher' with the self-inverse property, distinguishing it from sibling tools like caesar_encrypt/caesar_decrypt. The verb 'Apply' and resource 'ROT13 cipher' are specific.

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?

No guidance on when to use rot13 versus alternatives like caesar or vigenere ciphers. The self-inverse hint is present but no explicit when/not or sibling differentiation.

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