cyberchef_classical_cipher

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint, so the safety profile is covered. The description adds that this is a pure encode/decode transform and that disputed conventions are exposed as parameters, which is useful but does not go into output format, error behavior, or operational edge cases.

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 front-loaded sentences with no filler. The first sentence delivers the cipher list and scope; the second gives one concise rationale for the large parameter surface. Every clause earns its place.

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 high-complexity tool with 13 parameters, the description stays appropriately high-level while the schema's 100% coverage carries invocation details. It supplies key selection context: which ciphers, the tap-code equivalence, and the convention-parameter principle. An explicit output contract would be the only notable addition, but for encode/decode transforms the return shape is largely inferable.

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% and every parameter already has a detailed description, so the baseline of 3 applies. The description's statement that every contested convention is a parameter is a useful design principle but adds no concrete parameter-level meaning beyond the schema.

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 names a specific verb ('encode and decode') and a concrete resource set ('Playfair, the Polybius square, ADFGVX and Baudot/ITA2'), and explicitly frames the tool as covering ciphers CyberChef lacks. The parenthetical about tap code being a Polybius square prevents a common mis-selection. This clearly distinguishes the tool from sibling operations.

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?

It clearly scopes use to the four listed classical ciphers and tells the agent these are ciphers CyberChef has no native operation for, which establishes when this tool is the right choice. It does not name a specific sibling tool as an alternative or list exclusion cases, but the selection context is strong enough to guide an agent.

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