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

Annotations only declare readOnlyHint and openWorldHint. The description adds substantive behavior beyond that: a cost of $0.002 per successful call, payment via x402 in the call's _meta across specific chains, failed calls being free, and the latency expectation that funded launches are typically scanned within minutes. Return format is not described, and there is no output schema, but the cost and freshness disclosure is genuinely useful operational context.

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?

Content is dense but front-loaded with the resource and ordering before cost mechanics. The payment sentence is long and lists many chains, but every clause (cost, currency, x402, free failures) carries practical weight for an agent deciding whether to call. No filler sentences.

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 read-only, two-parameter feed with no output schema, the definition covers freshness, verdict availability, cost, payment channel, and failure behavior. Remaining gaps are modest: the response shape and pagination semantics are unspecified, but the schema covers defaults and bounds for limit.

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%, so both parameters carry their own documentation and the baseline is 3. The description adds only the Arc chain to the picture, and notably the schema's own chain description omits arc while the top-level text includes it, which is a minor inconsistency the prose partially rescues. No added meaning for limit is provided beyond the schema.

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 names a specific resource (newest token markets) across named chains and venues (PancakeSwap, Uniswap), states ordering (newest first), and says it includes ChainK9's verdict where a scan exists. That is enough for an agent to know what it returns. It does not, however, distinguish itself from the sibling launch-feed, which an agent could easily confuse with this tool.

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 only implied: browsing the newest launches, with the note that funded launches are usually scanned within minutes so a verdict is likely present. There is no explicit when-to-use/when-not guidance and no pointer to alternatives such as launch-feed, scan, or verdict for deeper analysis, so the agent must infer routing.

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