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

With no annotations, the description carries the full burden and does substantial work: it enumerates the alert categories (authority re-enabled, LP unlocked, liquidity pulled, sell blocked, new red flags) and discloses the billing model (shared free tier with check_solana_token, then x402 via POST /v1/paid/diff). It doesn't say whether the call is read-only/side-effect-free or what happens when `previous` is stale or malformed.

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 action and resource, then inputs, then outputs, then billing — a sensible order with no filler sentences. It is dense and semicolon-chained, which makes it slightly harder to scan than a fully structured version.

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, and the description compensates by describing both return components (alerts on changes plus the fresh result). Billing and the prerequisite source of `previous` are covered; only edge behavior for an invalid or outdated `previous` payload is left unstated.

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 0% and `previous` is an untyped open object, so the description must compensate — and it does by identifying `mint` as the token mint and `previous` as a prior Haris result from check_solana_token or an earlier diff. It stops short of specifying the required shape or which fields of the prior result are actually diffed.

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 and resource ("diff a Solana token") and defines the two-part output (change alerts plus the fresh result). It also names the sibling check_solana_token as the producer of the `previous` input, so an agent can tell it apart from check/deep_check/batch without opening a schema.

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?

Clear usage context: this is the follow-up call you make with a stored result from check_solana_token or an earlier diff. It doesn't state exclusions (e.g. when to prefer deep_check_solana_token instead, or that a first-time check is required before diffing), which keeps it short of a 5.

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