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

Annotations already declare read-only, idempotent, non-destructive, and closed-world behavior, so the safety profile is covered. The description adds genuinely new context: the ordering ('newest first') and that results include the ledger head, plus the 'free' cost signal. However, it does not explain pagination behavior or what 'ledger head' means, leaving gaps for a listing tool.

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 tight sentence with the key facts front-loaded and no filler. It is efficient, though the terseness contributes to the under-specification captured in other dimensions.

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 simple two-parameter, zero-required listing tool with rich annotations and no output schema, the description covers cost, ordering, and a hint of return content. But with no output schema, the return value deserves more than the opaque 'ledger head', and before_seq pagination semantics remain unexplained.

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 carry parameter meaning. 'Newest first' implies the ordering that before_seq paginates against, but before_seq itself is never explained (cursor? sequence boundary? inclusive/exclusive?) and limit's maximum of 500 is only in the schema. Compensation is 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 largely restates the title ('Latest Proof Records') and adds ordering ('newest first') plus a vague return element ('with the ledger head'). No explicit verb like 'list' and no differentiation from siblings such as proof_index or agent_records, though the ordering detail gives it some substance beyond the name.

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?

'Free, read-only' signals that it is safe and costless to call, but there is no guidance on when to use this versus proof_index, proof_check, or proof_verify_record. The agent is left to infer the selection criteria from tool names alone.

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