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

Annotations already declare non-readOnly and importantly non-idempotent, and the description reinforces that by disclosing the trial/credit side effects and 'only needed once', which maps directly to the duplicate-creation risk. It does not state what happens if the user already has a workspace, nor what is returned.

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?

A single sentence that front-loads the action and packs in the trial terms and the once-only constraint with no filler. Nothing could be removed without losing meaning.

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 two-required-param bootstrap tool with full schema coverage and adequate annotations, the description covers purpose, cost, and call frequency. The remaining gap is post-call behavior — with no output schema, it does not say whether the created workspace/brand identifiers are returned for chaining.

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% with both required fields documented inline ('Company or agency name', 'First brand to adapt campaigns for'). The description's mention of 'workspace' and 'first brand' loosely maps to the two params but adds no format or constraint detail beyond the schema, so 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?

Specific verb plus two concrete resources ('Create the signed-in user's Kulture workspace and first brand'), scoped to the signed-in user and pinned to a 14-day trial with 5 credits. No sibling creates a workspace or brand-only onboarding entity, so the agent can disambiguate immediately.

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?

'Only needed once' clearly signals this is an onboarding/bootstrap call rather than a repeatable operation, which is the key usage context. It stops short of naming what to do instead if a workspace already exists (e.g. list_brands) or stating a failure mode on repeat invocation.

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