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

There are no annotations, so the description carries the full burden of behavioral disclosure. It only says 'explorer,' implying a read-only operation, but does not disclose what happens when neither parameter is provided, what inputs are valid, what output format to expect, or whether the tool retrieves block data, transaction data, or both.

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 short and front-loaded, which is structurally clean, but it is under-specified rather than concise. It barely adds information beyond the tool name and leaves out essential usage details.

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 annotations, no output schema, and a huge sibling list of blockchain tools, the description is far too thin to support correct invocation. An agent cannot determine what inputs to provide, what output will be returned, or how this explorer differs from tools like x402-tx-status or x402-block-number.

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%, but the parameter descriptions 'Tx to process' and 'Hash to process' are essentially meaningless—they do not distinguish transaction hash from block hash, specify encoding, or clarify which parameter is appropriate in which scenario. With no required parameters, the description also fails to explain whether one or both must be supplied. This is a case where coverage exists but semantic value is very low.

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 identifies the resource as a blockchain block and transaction explorer, which conveys a read/lookup purpose. However, it largely restates the tool name and lacks a concrete verb or explanation of what action is performed with the supplied tx/hash values. It does not meaningfully distinguish itself from the many related blockchain sibling tools.

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 no guidance on when to use this tool versus alternatives, no mention of blockchains or networks supported, and no context about whether to supply a transaction hash, block hash, or both. An agent would have to infer usage entirely from the tool name and parameters.

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