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

Annotations already declare readOnlyHint=true, destructiveHint=false, and openWorldHint=false, so the safety profile is covered. The description adds that it checks against the ARRIVE 2.0 guideline and vaguely returns 'ARRIVE 条目核对', but it does not explain the return format or what a checklist check actually produces.

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 pipe-delimited structure is front-loaded with the tool name and USE WHEN clause, making it easy to scan. It repeats the title in the description and includes aliases, but the overall text remains compact and functional.

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 simple zero-parameter checklist tool, the definition is nearly complete: usage context, aliases, and a hint at the return content are present. The main gap is that the exact output or checklist behavior is not described, and the relation to reporting_checklist is not clarified.

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?

This is a zero-parameter tool, so there are no input semantics to clarify. The baseline for zero parameters is 4, and the description does not create any parameter ambiguity.

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 (ARRIVE 2.0 checklist) and action context (check an animal experiment against the ARRIVE 2.0 reporting guideline). It is clear what the tool is for, though it does not explicitly distinguish itself from the sibling reporting_checklist tool.

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 USE WHEN clause gives clear context: use it to check an animal experiment against ARRIVE 2.0. It does not state when not to use it or name the generic reporting_checklist alternative, so it falls short of full routing guidance.

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