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

Annotations already cover read-only, idempotent, non-destructive and open-world. Beyond that, the description adds two genuinely useful behavioral facts: the call is free and fast, and critically it returns NO verdict (a truncated result set), which prevents an agent from treating the output as a full assessment. It also discloses the external data dependency (DexScreener).

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 front-loaded sentence leads with the two decisive qualifiers (free, no verdict) before listing the return contents. It is dense but every clause maps to a returned field; the phrasing 'is this Ethereum token an IMD launch' is slightly awkward to parse but not wasteful.

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 carry the return contract, and it does by enumerating the four result components. What is missing is failure behavior (invalid address, token with no hook, no DexScreener pair) for a tool that fans out to external data sources.

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?

Only one parameter, and the schema documents it at 100% coverage with a regex pattern for the 0x address. The description adds nothing about the parameter beyond context already in the schema, so the 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?

The description states a specific resource (an Ethereum ERC-20 token) and enumerates the exact outputs: IMD launch status, DexScreener market/liquidity, same-symbol IMD launches, and Uniswap v4 hook permission bits. The 'free and fast, no verdict' framing implicitly separates it from token_verdict, but the sibling is never named, so differentiation relies on inference.

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 and fast, no verdict' hints at when to prefer this over the full verdict tool, and 'preview' implies a lightweight first pass. However, it never names token_verdict as the alternative or states when not to use this tool, leaving the choice to inference.

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