Get CNKI record metadata

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

No annotations are provided, so the description carries the full burden. It discloses the read-only nature ('Fetch metadata') and what it does not do ('Not a PDF download'), but lacks detail on return format, error behavior, or authentication. This is a moderate level of transparency.

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 brief: a one-line purpose, a negative clarification, and one-line parameter explanation. Every sentence adds value and it is front-loaded with the main purpose.

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?

This is a simple one-parameter get tool. An output schema exists (not shown), so return value explanation is not required. The description covers the parameter's format and source, and the 'Not a PDF' note prevents a common misuse. It is complete enough for a basic fetch operation.

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 schema only provides a 'url' string with no description. The description adds meaning by specifying 'A CNKI Space or CDMD detail URL returned by search', clarifying the required format and provenance. With 0% schema coverage, this compensation is valuable.

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 'Fetch metadata from a 知网 / CDMD / cnki.com.cn record page' with a specific verb and resource. It also distinguishes itself from PDF download and ties the input URL to a search result, clearly separating it from the sibling 'search' 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?

It explicitly mentions the URL must be 'returned by search', implying a workflow where search is used first. It also warns 'Not a PDF download', which is an exclusion. However, it does not explicitly name the alternative or state when not to use, so slightly shy of full guidance.

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