Close list in Docling document

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

Annotations already indicate this is a non-read-only, non-destructive operation. The description adds useful behavioral context by disclosing the stack cache requirement and that it closes a previously opened list structure, which helps the agent understand it is a state-changing operation.

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 short and front-loaded, with the core action in the first sentence. The second sentence is somewhat redundant with the first, but it adds the 'previously opened' and 'stack cache' nuance, so the slight overlap is acceptable.

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 one-parameter mutation tool with an output schema and annotations covering read-only/destructive hints, the description provides enough context: what it closes, where, and the required preconditions. It does not explain error handling, but that is not essential for an agent to call it correctly.

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 100%, with document_key already described as the unique identifier of the document in the local cache. The description reinforces that the document must already exist, but does not add meaningful new parameter-level semantics beyond the schema.

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 uses a specific verb ('closes') and resource ('list group in an existing document in the local document cache'), and clarifies it operates on a previously opened list structure. This clearly differentiates it from sibling tools like open_list_in_docling_document and add_list_items_to_list_in_docling_document.

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 gives concrete preconditions: the document must exist and the stack cache must have more than one item. It implies the tool should be used after opening a list and adding items, though it does not explicitly name alternatives or state when not to use it.

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