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

Annotations declare readOnlyHint=false, destructiveHint=false, and openWorldHint=true, so the safety profile is partly covered. The description adds real value beyond them: it discloses that the operation is state-changing, requires prior authorization, and can alter content visibility in a public Space.

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?

Three sentences, front-loaded with the action triggers and followed by the state-change caveat and parameter requirements. Efficient, though the opening sentence packs several verbs together and could be marginally tighter.

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 state-changing mutation with annotations and a fully documented schema, the description covers purpose, side effects, authorization, and parameter sourcing. Return behavior is unspecified but no output schema exists; the remaining gap is minor.

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 100%, so the schema documents all four params (baseline 3). The description adds meaning by reinforcing which IDs are required and by telling the agent where parent_id and order values should come from (list-space-documents), which the schema does not.

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?

States specific verbs (move, nest, unnest, reorder, reposition) and the resource types affected (page/document, folder, external link). This clearly distinguishes it from update-space-item (content edits) and copy-space-item (duplication) among the siblings.

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?

Explicitly frames the trigger ('Use this when the user wants to move, nest, unnest, reorder, or reposition...') and points to list-space-documents as the source for parent_id/order values. It does not, however, name a sibling alternative or a when-not-to-use condition.

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