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

Annotations only declare readOnlyHint=false, destructiveHint=false, and openWorldHint=true, so the description carries extra weight by stating the operation is state-changing, happens directly after authorization, and that content placed in a public Space becomes publicly accessible. That last point is a real consequence not derivable from the schema or annotations, though conflict/overwrite behavior is still unstated.

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?

Two sentences, front-loaded with the use case and followed by the state-changing warning and visibility caveat. No filler, no restatement of the title, and every clause carries actionable information.

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 7-parameter mutation tool with no output schema and rich annotations, the description covers purpose, prerequisites, side effects, and visibility risk. It stops short of describing failure modes (duplicate titles, invalid parent_id) or permission requirements beyond the vague "after authorization."

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 baseline is 3, but the description adds a conditional relationship the schema does not express: content or URL is required "when relevant" depending on item type, even though external_url and content are both optional in the schema. It also restates the key required inputs (numeric space_id, type, title), reinforcing them without redundancy.

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 verb and resource set (create a Space page/document, folder, or external link) scoped to an existing Space, so an agent immediately knows what the tool produces. It does not, however, differentiate itself from the close sibling create-space-document, which appears to overlap in scope.

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?

"Use this when the user wants to create a Space page/document, folder, or external link inside an existing Space" gives clear activation context tied to user intent. No exclusions or named alternatives are offered, so an agent cannot tell from the text why it would pick this over create-space-document or create-space-repository-link.

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