block_latest

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

No annotations are provided, so the description must disclose behavioral traits. It mentions pricing and API endpoint but lacks details on rate limiting, error responses, data freshness, or prerequisites (e.g., does it work for all chains?). The description is insufficient for safe autonomous use.

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 very short, which could be seen as concise, but it omits critical information. It is front-loaded with a tag '[Blockchain]' and pricing, but the lack of substantive content makes the conciseness a weakness rather than a strength.

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 simplicity of the tool (one required parameter, no output schema), the description should at least specify the return format or any limitations. It fails to provide enough context for an agent to understand what to expect, especially without annotations or output schema.

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 covers 100% of parameters with a description for 'chain'. However, the description does not add any extra meaning beyond the schema's own description, and there is a contradiction: the schema marks 'chain' as required but its description says 'optional'. The description itself does not clarify this discrepancy.

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 'latest block' in Chinese, but is vague. Combined with the name 'block_latest' and a single 'chain' parameter, it implies retrieving the most recent block for a blockchain. However, it doesn't specify what information is returned or how it differs from sibling tools like 'block_detail'.

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. Sibling tools like 'block_detail' exist, but the description gives no comparison or context for selection.

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