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

With no annotations, the description carries the full burden and does well: it declares the operation is read-only, that it is stateless (hash not persisted), and that no balance or history is ever returned. It omits error/negative-result behavior and any confirmation-depth or network-availability caveats, which keeps it below 5.

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 core check in the first line, then the statelessness caveat, then per-parameter notes — every sentence earns its place. The line breaks inside sentences make it slightly ragged, but nothing is redundant.

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 3-parameter tool with no annotations and no output schema, the description covers behavior and parameters thoroughly. The remaining gap is the return shape: it implies booleans for success/address/amount but never says what the response actually contains, which matters given there is no output schema.

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%, so the description must compensate and does: tx_hash is specified as 0x + 64 hex, jumlah_usdc as the expected nominal (example 500), and pengirim as an optional payer wallet that, when supplied, constrains the transaction sender. All three parameters gain meaning absent from the bare schema titles.

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: a read-only check of a USDC transaction on Base, verifying success, official recipient address, and sufficient amount. That is far more precise than the name alone and does not overlap with the other siblings (token safety score, checklist, catalog, 402 validation). It does not explicitly contrast itself with any sibling, so it stops 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?

'BACA-SAJA' plus the stateless note implies when the tool is appropriate (one-off payment proof) and gently excludes history/balance lookups. However, it never states when to prefer a sibling such as validasi_respons_402 or info_pembayaran, nor any prerequisite (e.g. transaction already confirmed on-chain).

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