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

Discloses the tool is paid (5 iron-cents) and returns a toll, along with the sealed sandbox environment. However, no details on success/failure behavior, output format, or error handling, leaving gaps for an AI agent.

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?

Extremely concise: one sentence and a parenthetical. Front-loaded with purpose, every word adds value. No redundancy.

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?

Missing crucial details: response format (e.g., compilation success or failure), cost impact, and meaning of 'toll'. Without output schema, the description should clarify what the agent receives, but it does not.

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%, and the description only adds that 'code' is Rust source code. No information on size limits, formatting, or other constraints beyond the schema's type 'string'. Minimal value added over 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?

Clearly states the tool verifies Rust compilation in a sealed sandbox. Distinguishes from siblings like 'calc' or 'catalog' by specifying the programming language and sandbox environment.

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?

Implied usage for checking Rust code, but no explicit when-to-use or alternatives guidance. The description does not mention when not to use this tool or suggest sibling tools for similar tasks.

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