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

Annotations already indicate idempotence and non-destructive behavior. The description adds meaningful behavioral specifics not in the schema or annotations: the created room is empty, private, investor uploads are disabled, and a stable idempotency key is required. It does not cover error or output behavior, but the output schema and annotations reduce that burden.

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 a single dense sentence with no filler. The purpose is front-loaded and the idempotency requirement follows immediately, making it easy to parse and act on.

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 simple creation tool with an output schema and safety annotations, the description is close to adequate. However, it omits any explanation of project_id and the data object, and only partially explains invocation expectations, so an agent must rely heavily on parameter names and schema constraints.

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 needed to compensate. It only elaborates the idempotency_key parameter (stable key requirement) and says nothing about project_id or the data/RoomInput fields (name, description), leaving them to be inferred from names and constraints.

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 precise action and resource: "Create an empty private investor room" with explicit initial-state details (empty, private, investor uploads disabled). This clearly distinguishes it from SparkRoom siblings like sparkroom.update, sparkroom.add_documents, and sparkroom.create_share_link.

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 clear context for when to call the tool: to create a new SparkRoom with a specific initial configuration. It also communicates a concrete operational requirement (stable idempotency key), though it does not explicitly name alternatives or state when not to use it.

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