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

With no annotations, the description carries full behavioral burden. It usefully discloses OAuth scopes, pricing/balance checks, and per-account limits, but omits whether generation is asynchronous, what is returned, and failure behavior for insufficient credits.

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 with no wasted text. The primary action is front-loaded, followed by prerequisite auth information.

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 16-parameter generation tool with no annotations, no output schema, and no schema descriptions, the description is far too thin. Auth and billing context helps, but parameter semantics and async/return behavior are missing.

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?

There are 16 parameters with 0% schema description coverage, and the description adds no parameter meaning at all. It does not even mention the required model parameter or explain any of the various generation options.

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: "Start a Studio generation." It is clearly distinguishable from the read-oriented sibling get_generation, though it does not explicitly name alternatives.

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 implies this is the action tool for creating a generation, but gives no explicit when-to-use/when-not-to-use guidance or routing to siblings such as get_studio_pricing or get_my_credits before starting.

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