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 one behavioral trait: 'Opens a separate editor cabin for this session,' which is useful session-isolation context. However, it does not say whether the operation is read-only, what happens to the current cabin, what the tool returns, or whether opening affects the document.

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 compact, front-loads purpose, and is organized into three sentences. The long enumeration overlaps with the schema enum and introduces an invalid entry, so not every word fully earns its place, but it remains readable and structured.

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 one-parameter demo opener, most needed facts are present: allowed demo names, the sibling for user files, and session behavior. However, with no output schema or annotations, the agent still lacks expected return or side-effect context, and the default/required contradiction plus 'xtools' create avoidable ambiguity.

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 has 0% description coverage, so the description must compensate. It adds category grouping (documents vs. workbooks) and a default value, but the enum already names the allowed slugs. It also lists 'xtools,' which is absent from the input schema, and claims a default even though slug is required, making the guidance partly misleading.

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 names a specific action, 'Open', and resource, 'demo files by name', while enumerating documents versus workbooks. It explicitly contrasts with document_open_file, so an agent can distinguish this tool from its sibling. The purpose is unambiguous despite a stale 'xtools' value.

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 says 'For your own file use document_open_file,' naming the sibling and the condition that selects it. It also states the default 'footnotes' and the demo-file scope, giving clear when-to-use and when-not-to-use guidance. The core routing is explicit.

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