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

No annotations are provided, so the description must fully disclose behavior. It only lists categories and does not mention side effects, permissions, return behavior, or operational details. This offers no transparency into the tool's actual behavior.

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 brief and contains no filler, but it is a fragment rather than a well-formed sentence. It is concise in length but under-specifies the tool's functionality, so it earns a middle score.

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?

With no output schema and no annotations, the description must provide sufficient detail to use the tool. It only mentions categories, leaving all operational context (e.g., parameters, return values, workflows) undefined. This is inadequate for a tool handling cryptographic operations.

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?

The input schema has only 'operation' and 'params', both vaguely named, with 0% schema description coverage. The description does not clarify valid operation values, the structure of params, or relationships between them. It fails to compensate for the schema's lack of detail.

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 states the domain (cryptographic operations) and lists example areas (BIP39, wallets, signatures, hashes), but lacks a specific verb or resource. It does not clearly distinguish from sibling tools like hash_text or content_hash, which also cover hashing. The purpose remains ambiguous.

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. The description does not mention any context, preconditions, or exclusions. Given overlapping sibling tools, the lack of usage direction is a significant gap.

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