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

With no annotations provided, the description carries the full burden. It does disclose two key traits: 'offline' (no network dependency) and 'self-inverse' (applying twice returns original). However, it omits details like whether it handles non-ASCII characters, error behavior, or output format. For a simple cipher, this is adequate but not rich.

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 a single sentence that is front-loaded with the tool's core purpose. It avoids unnecessary words and is easy to parse. It could be slightly expanded with parameter guidance, but as a concise statement it works.

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's simplicity, the description covers the essential behavior (cipher type, offline, self-inverse) and an output schema exists to describe return values. However, it lacks usage guidelines and parameter explanation, which are minimal gaps for a one-parameter cipher tool.

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 description coverage is 0%, and the description does not explain the meaning of the 'q' parameter. While the tool name and context imply q is the input string, there is no explicit statement. The description adds no value over the raw schema, so the agent must guess.

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: applying the ROT47 ASCII cipher. It is distinct from siblings like rot13 and atbash by name and by the mention of ROT47, making the purpose clear. It could be more explicit about encoding vs decoding, but the term 'cipher' implies transformation.

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 is given about when to use this tool instead of alternatives like rot13, atbash, or other ciphers. There is no mention of use cases, limitations, or exclusions. The agent is left to infer from the name alone.

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