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

The description discloses the OAuth-like flow (user approval via browser), the side effect of creating a new account with a 14-day trial upon approval, and the interaction pattern of waiting for user confirmation. This goes beyond the basic annotations (readOnlyHint=false, destructiveHint=false) and provides meaningful behavioral context.

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?

While multi-sentence, every sentence serves a purpose: stating the core action, explaining the approval link, covering both new and existing users, giving call triggers, and specifying post-call behavior. The description is front-loaded with the primary purpose and contains no redundant wording.

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?

Given that the tool takes no parameters and has an output schema (likely describing the returned link), the description covers all needed context: the interactive flow, the trial creation side effect, when to call it, and how to handle the waiting period. It is complete for a zero-parameter OAuth-like connection 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?

The tool has zero parameters, so the input schema trivially provides full coverage. No parameter explanations are necessary, and the description does not omit anything relevant. Baseline of 4 applies for zero-parameter tools.

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 explicitly states the verb ('Connect') and resource ('a Dreambooth Studio account') and explains the return of an approval link. It clearly distinguishes this tool from siblings like connection_status or get_credits, which serve different purposes.

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?

Provides explicit usage triggers: call when another tool reports no account connected, or when someone asks to connect, sign up, or switch accounts. Also instructs to ask the user to open the link and await confirmation, and explicitly says not to call this tool again while waiting.

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