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

Annotations already declare readOnlyHint, idempotentHint, and openWorldHint, so the safety profile is covered. The description adds genuinely new behavioral context: a per-call price ($0.001 USDC, x402 on Solana) and a parallel HTTPS endpoint, which an agent needs before invoking a paid 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?

Front-loaded with the definition, followed by an example, the domain, then payment and endpoint details. Each sentence earns its place, though the raw endpoint URL adds some visual clutter.

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?

A simple, pure, read-only function with one parameter and no output schema; the description conveys what is computed, the valid range, and a sanity-check example. Output type (integer) is only implied, a minor gap for an otherwise complete definition.

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 0%, so the description must carry the parameter meaning, and it does: n is defined as the number of terms, bounded 1–100000, with a concrete example (n=5 → 11). It does not state the parameter is required or its integer type, but the semantic meaning is clear.

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?

States a specific verb+resource: the sum of the first n Golomb terms, with the index range a(1) through a(n) spelled out. This naturally distinguishes it from the sibling `golomb` (single term) and `golomb_inverse`, though neither sibling is named explicitly.

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 domain (n from 1 to 100000) and a worked example (first 5 terms sum to 11) imply when the tool applies, and the price line sets expectations for paid use. No explicit when-to-use/when-not or pointer to the sibling `golomb` for individual terms.

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