lucille_hash_message

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

No annotations are provided, so the description must cover behavioral traits. It discloses the hash algorithm (keccak256) and validation (message length 1-500 chars). However, it does not mention return value format, whether it has side effects, or any permissions needed. For a simple utility, this is adequate but not thorough.

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 extremely concise with two sentences, front-loading the key info. No unnecessary words, and every sentence serves a purpose.

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 utility with one parameter and no output schema, the description covers the purpose, algorithm, constraints, and usage note. It is fairly complete, though it could mention the output format (likely a hex string) to be fully self-contained.

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% with a description for the parameter. The tool description adds the hash algorithm detail, which supplements the schema. However, it repeats the length constraints already in the schema. Overall, it provides marginal added value.

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 action 'calculate keccak256 hash and validate message length' and the resource 'message'. It is distinct from sibling tools which are game-related, making its purpose unambiguous.

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 explicitly says 'Not required for x402 play — x402 handles everything automatically', which guides the agent not to use it when x402 play is involved. It implies standalone use but could be more explicit about when to choose this over other tools.

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