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

With no annotations, the description only states basic behavior (deduplicate and preserve order). It does not disclose handling of nested objects, stability, type handling, or error cases.

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 description is a single concise sentence with no extraneous information. Every word is necessary and contributes to clarity.

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 deduplication tool, the description adequately covers the core function. However, lack of output schema and minimal parameter detail leave some gaps, such as return format and handling of complex types.

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 coverage is 0%, and the description adds no parameter-level details. The single parameter 'items' is not elaborated, leaving agents without guidance on acceptable values or constraints.

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 clearly states the tool removes duplicates from list items while preserving original order. It uses a specific verb ('deduplicate') and resource ('list items'), and this purpose is distinct from sibling utility tools.

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?

No guidance on when to use this tool versus alternatives, or when not to use it. There is no mention of alternatives or context for its selection.

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