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

Annotations already declare readOnlyHint=false and openWorldHint=true, so the write nature is known; the description adds genuinely new context by noting creation happens directly after authorization and that content in a public Space becomes publicly accessible. This visibility consequence is meaningful behavioral disclosure beyond the structured fields. It stops short of describing return values or failure modes.

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 compact sentences, front-loaded with the trigger condition followed by the behavioral caveat. No filler, though the second sentence crams mutation, authorization, and visibility into one long clause.

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, the description covers the trigger, the state-changing nature, authorization, visibility risk, and required inputs. It omits what is returned (e.g., the new item ID) and how it differs from create-space-document, which are the remaining gaps.

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%, so every parameter is already documented in the schema, including the type enum values and the parent_id/path null semantics. The description restates the required set (space_id, type, title) and the conditional content/external_url relation, adding only marginal value. Baseline 3 applies.

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 a specific verb and resource ('create a Space page/document, folder, or external link inside an existing Space') and enumerates the item types. However, it does not distinguish itself from the sibling 'create-space-document', which appears to overlap substantially, so an agent cannot fully disambiguate without opening schemas.

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 trigger is stated explicitly ('Use this when the user wants to create...') along with the required inputs and the conditional 'content or URL when relevant'. No alternatives or when-not conditions are given, so routing between this and create-space-document remains ambiguous.

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