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

Annotations already declare a safe read (readOnlyHint=true, destructiveHint=false, openWorldHint=true), so the bar is lower. The description adds genuinely useful behavioral context beyond them: the $0.01 cost / plan-key inclusion and the fact that results are grouped by minting-transfer thresholds. Return format and pagination behavior are still unstated.

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 resource and scope, then specifics, then commercial terms. Dense but every clause carries information; the parenthetical pricing note is slightly trailing but legitimate.

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?

With no output schema, the description carries the burden of describing returns, and it does so reasonably (100-transfer and 1,000-transfer cohorts, 24h and 7d counts, grouping by public name). An agent has enough to decide whether this answers its question, though exact response shape is not guaranteed.

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 100% for the single 'limit' parameter, so the schema already documents range (1-200) and default (50). The description adds nothing about the parameter, 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 verb+resource (enumerate every launchpad and factory on Arc, chain id 5042) and names concrete examples (ArgusPad, RadarDEX, Uniswap's LiquidityLauncher). The 'since genesis' scope implicitly distinguishes it from the sibling robinx_arc_new_launches, though it never names that alternative explicitly, keeping it just short of a 5.

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 is implied (list the full historical set of launchpads) but there is no explicit when-to-use, when-not, or named alternative. The pricing note tells the agent about cost, not about selection context. No prerequisites or exclusions are stated.

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