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

No annotations are supplied, so the description carries the full disclosure burden, and it discloses almost nothing: not whether it is read-only, which chain(s) it covers, whether it costs credits, or how deep the 'risk' analysis goes. 'Activity and risk' hints at a safe read, but nothing is confirmed.

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?

One short sentence, front-loaded with the verb and resource, so it is not bloated. But the brevity is under-specification rather than economy: it omits information an agent needs and would benefit from a second clarifying sentence.

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 three-parameter, zero-coverage, unannotated tool with no output schema, in a crowded wallet/scan family, the description leaves the agent unable to call it correctly or choose it deliberately. Nothing about scope, chain, or inputs is resolved.

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 description coverage is 0% across three parameters (input, wallet, address) whose names overlap confusingly — an agent cannot tell whether 'wallet' and 'address' are aliases, which is required, or what 'input' accepts. The description adds zero parameter meaning, so the gap is entirely uncompensated.

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?

It states a verb (Scan) and a resource (wallet) plus the output scope ('activity and risk'), so the purpose is broadly legible. However, it is close to a restatement of the name and does not distinguish itself from near-identical siblings such as x402-wallet-activity, x402-wallet-intel, x402-wallet-report, or x402-token-risk-report, all of which plausibly cover the same ground.

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?

There is no when-to-use guidance, no prerequisites, and no mention of an alternative tool. With at least seven wallet-* siblings and several risk/scan siblings, an agent has no basis for picking this one over wallet-intel or token-rugcheck.

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