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

Annotations already declare readOnlyHint=true, so the read-only nature is covered. The description adds the max 30-day window and 'Free' (cost), but does not disclose return format, pagination, or any other behavioral traits. It does not contradict annotations.

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?

A single, short sentence with no fluff. The key constraint (max 30 days) is front-loaded, and the 'Free' note is a useful extra. Every word earns its place.

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?

The description is ambiguous about what the tool actually returns or does beyond 'record hashes and transactions'. It does not clarify whether it returns a list, a verification result, or something else. With no output schema, this is a significant gap for an agent to call it correctly.

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%, so the description must compensate. It explains that 'days' refers to 'the last N days', which clarifies the parameter's purpose, but it does not specify units or expected format beyond the schema's min/max/default. This is adequate but minimal.

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 a specific action (verify) and resource (record hashes and X Layer transactions), and adds a time window. However, it does not explicitly distinguish itself from sibling tools like chain or report, and the verb 'verify' is somewhat vague without further context.

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 given on when to use this tool versus alternatives. The only hint is 'Free' and the max-30-days constraint, but there is no mention of scenarios or exclusions that would help an agent choose it over siblings.

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