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

Annotations are all false, so they provide no safety or side-effect information. The description adds useful behavioral context by warning that 'keep' builds the entire sheet and requires human confirmation, implying a consequential, non-idempotent action. However, it does not disclose the behavioral implications of retry or pose beyond what the schema states.

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 description is two sentences with no filler. The purpose and the branch options are front-loaded, and the human-approval warning is placed where it matters. Every sentence earns its place.

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?

With 5 parameters, a full input schema, and an output schema present, the description covers the workflow-critical guidance: the need to ask the human before 'keep'. It is sufficient for invoking the tool correctly, though it could more explicitly state when to choose mascot_step over a sibling tool.

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 the baseline is 3. The description adds no further detail about note, label, prompt, or with_model; it only paraphrases the action options already covered by the schema. It is adequate but does not enrich parameter understanding.

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 uses an active verb ('Move the mascot on') and immediately lists the three possible actions: keep, retry, and pose. This makes the tool's role clear and sets it apart from simple get/create/render siblings, though it relies on the schema to fully define the actions.

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 description clearly instructs to ask the human before using 'keep' because it builds the whole sheet, which is important workflow guidance. It also presents the three branches of use, but it does not explicitly contrast the tool with sibling tools such as create_mascot or render_asset.

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