create_null_cipher

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

The description does not disclose important behavioral details such as the missing 'n' parameter for nth_word mode, nor does it state the tool is non-destructive or has no side effects. Since no annotations are provided, the description carries the full burden but falls short.

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 concise (three sentences, ~60 words), front-loaded with the purpose, and efficiently explains the two modes and output. Every sentence earns its place with no fluff.

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?

The description fails to mention that nth_word mode requires an additional 'n' parameter, which is absent from the input schema. This omission makes the tool specification incomplete and potentially confusing. No output schema is provided, but description adequately states return value.

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 100%, so baseline is 3. The description repeats information already in the schema's parameter descriptions (e.g., modes explained in both places). It adds no new semantic value about the parameters themselves.

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 creates a null cipher text hiding a secret message via letter selection, and distinguishes two modes. However, it does not explicitly differentiate from sibling creation tools like text_acrostic, and the missing 'n' parameter for nth_word mode slightly undermines clarity.

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 provided on when to use this tool versus alternatives (e.g., text_acrostic or other text steganography creation tools). The description only explains functionality without suggesting appropriate scenarios or prerequisites.

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