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

Beyond the annotations, it discloses that this consumes no extraction or credits, requires schema-write permission, is unavailable on the bounded synthetic review account, is bounded by the plan limit, and will not overwrite previously saved fields on slug reuse. That is substantive operational context an agent could not infer from the hints alone.

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 precondition is front-loaded and the two short follow-on sentences (no credit use, permission requirement) are high-value. The first sentence is dense but each clause carries distinct information, so little is wasted.

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 mutating tool with annotations and an output schema, the description covers the crucial gates: user consent, plan limit, permissions, account restriction, and non-destructive slug reuse. Only the failure/limit-exceeded behavior and parameter specifics are unaddressed.

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 0%, so the description must carry the parameter burden, and it only partially does: it implies the slug corresponds to the previewed starter and that user agreement maps to confirm_create. It never explains the slug format/source or that confirm_create must be literally true.

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 pairs a specific verb ('create its schema', 'save') with a specific resource (a previewed starter's schema) and states the alternate behavior (reuse the same slug). It is clearly distinct from the sibling listing/discovery tools such as dokyumi_list_starters.

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 gives an explicit triggering condition: only after the user agrees to save a previewed starter, which is the key gating rule for an agent. It does not name an alternative tool or a when-not-to-use path beyond that precondition, so it falls short of a 5.

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