railfence_process

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

With no annotations provided, the description carries the full behavioral burden but only restates the operation. It says nothing about output format, whether the cipher is symmetric/keyless (rail fence needs no key, which is worth noting), or how invalid input (e.g., rails less than 2) is handled.

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?

A single front-loaded sentence that fully states the operation with zero filler. Nothing is wasted and no detail is buried.

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, stateless, keyless transform with a fully documented three-parameter schema and no output schema, the description is nearly complete. The only minor gap is that it doesn't note the return value is the transformed string, but that is inferable for a cipher utility.

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 100%, so the schema already documents text, rails (default 3), and the decrypt flag. The description adds no semantic detail beyond what the schema provides, making the baseline of 3 appropriate.

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 gives a specific verb pair (encrypt/decrypt) and names the exact algorithm (rail fence / zigzag cipher), so an agent knows precisely what transformation it performs. It does not, however, distinguish itself from the many sibling cipher tools such as atbash_process, vigenere_process, or rot13_convert.

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 choose this cipher tool over the numerous sibling cipher/encoding tools, nor any prerequisites or exclusions. The only implicit usage signal is the decrypt flag, which is already a schema parameter rather than descriptive guidance.

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