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

No annotations are provided, so the description carries the behavioral disclosure burden. It usefully reveals the output dimensions including the 'suspected cross-chain bridge' heuristic, but it does not explicitly state that the operation is read-only, how it handles invalid hashes, or any failure behavior.

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 compact sentence that front-loads the core action and then lists concrete output aspects. Every word contributes meaning, with no filler or redundancy.

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 single-parameter tool with no output schema, the description covers the main return facets an agent needs: status, sender/receiver with labels, transfer details, and bridge-suspicion flag. It could be strengthened by noting that the call is read-only and how to handle unknown transactions, but the essential calling context is present.

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?

The input schema already fully documents the only parameter (txHash) with '0x 开头的交易哈希', giving 100% schema coverage. The description adds no additional parameter-level detail, so the baseline of 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 verb ('解释') and a specific resource ('一笔交易'), then enumerates what the explanation covers: status, parties with identity labels, transfer details, and suspected cross-chain bridge behavior. This makes the tool's purpose clear, though it does not explicitly contrast with sibling tools like detect_cluster or track_cctp.

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?

The description implies the tool is used when an agent needs to understand what a transaction did, but it provides no explicit when-to-use guidance, exclusions, or alternative tool suggestions. Usage context is implied rather than stated.

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