to_hex

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

With no annotations provided, the description fully covers behavioral traits: read-only, stateless, idempotent, authentication details, rate limits, error handling, and data privacy. This is comprehensive and leaves no ambiguity about side effects or constraints.

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 structured with clear sections but is verbose for a simple tool. The behavioral transparency section is detailed but could be shortened. It earns its place but could be more concise without losing essential information.

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 (two parameters, one required), the description is thorough on behavior and parameters. However, it does not explicitly describe the return value format (the output schema exists but is not explained). This minor gap prevents a perfect score.

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%, so the description must compensate. However, it only provides minimal definitions: 'The text to analyze or process' and 'The api key to analyze or process.' These add little meaning beyond the schema's titles. The description does not clarify formatting, constraints, or expected input examples.

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 explicitly states 'Convert text to hexadecimal.' This clearly identifies the tool's function and distinguishes it from sibling tools like base64 or URL encoding, which perform different conversions.

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?

The description provides a 'When to use' section, but it is overly generic (e.g., 'structured analysis or classification'). It does not specifically guide when to choose hex conversion over alternatives, and the 'When NOT to use' note is generic. There is no direct comparison to siblings such as encode_base64 or encode_url.

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