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

Annotations already cover read-only, idempotent, non-destructive, open-world. The description adds the key behavioral fact annotations cannot express: the data is 'frozen and never edited' at launch time and includes a 24-hours-later outcome, so the agent knows it is a historical snapshot, not live state. No return-format or pagination detail, but the snapshot semantics are the important disclosure here.

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?

The core distinction from check_coin is front-loaded and useful, but the middle clause ('against / careful / clear (or launch facts only), the findings tallied, why...') is dense, elliptical, and hard to parse on first read. The information earns its place; the phrasing does not.

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?

There is no output schema, so the description carries the burden of saying what comes back, and it does enumerate the payload: launch facts, tallied findings/rationale, dev and funder's other coins of the week, and the 24h outcome. Combined with the annotations and fully documented single parameter, an agent has enough to call it correctly.

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% and the sole address parameter carries its own pattern and format documentation. The description adds no syntax or validation detail beyond that, so baseline 3 applies; it does reinforce the Robinhood Chain scoping of the address.

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 conveys a specific resource: a frozen, point-in-time record of a coin's launch call on Robinhood Chain, including findings, rationale, dev/funder history, and 24h outcome. It explicitly distinguishes itself from check_coin ('Not the coin now'), though the phrasing is idiosyncratic rather than a clean verb+resource statement.

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?

It names the alternative explicitly ('use check_coin for that') and states a hard scope constraint ('Robinhood Chain only'), which is exactly the routing information an agent needs. It stops short of an explicit 'use this when...' trigger, but the implied context (historical launch snapshot vs. live state) is clear.

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