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

Annotations cover the safety profile (readOnly, openWorld, non-destructive), and the description adds real value beyond them: explicit scope exclusions (no price/liquidity/holder data) and cost/access terms ($0.03 or a RobinX plan key). It does not cover error behavior for unknown tokens, keeping it short of a 5.

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 core resource, then the field inventory, then scope exclusions and cost. Dense and every clause carries information, though the field enumeration reads as a run-on and could be tightened.

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?

No output schema exists, so the description must describe returns — and it does so thoroughly by listing the record's components. Combined with annotations covering the safety profile and the schema covering the parameter, an agent has enough to invoke correctly; only error/edge-case behavior is absent.

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?

There is a single parameter with 100% schema description coverage ('Arc token address 0x…'), so the schema already carries the parameter meaning. The description adds nothing about the token argument — not its format, chain scope, or symbol-vs-address disambiguation — so baseline 3 applies.

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 resource (an Arc token's launch record) and enumerates its contents: launchpad, deployer, first pool timing, transfers, recipients, same-symbol siblings. The 'No price, liquidity or holder data' line implicitly distinguishes it from robinx_token, but sibling differentiation is by inference rather than explicit naming.

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?

Usage context is implied by the content list — an agent can infer this is for launch-provenance queries — but there is no explicit when-to-use/when-not statement or named alternative (e.g. 'for price data use robinx_token'). The pricing note is about cost, not selection guidance.

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