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

With no annotations, the description carries the full burden. It discloses the return value (URL) and mentions 'authenticated tenant' as a prerequisite, but does not explain side effects, whether it initiates an OAuth flow, or if it is safe to call multiple times. It is somewhat transparent but lacks depth.

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?

A single, focused sentence that front-loads the action and return value. There is no unnecessary detail, making it highly concise and clear.

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 the simplicity (no params, no output schema), the description is mostly complete but lacks details on prerequisites beyond 'authenticated tenant', potential failure modes, or what the agent should do with the returned URL. Some context is missing, but not critical.

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 zero parameters, so the description has nothing to add beyond the schema. Per the baseline rule for 0 params, this is acceptable; the description does not need to explain parameters.

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 clearly states the action ('Begin'), resource ('TikTok auth onboarding'), and the return value ('browser authorization URL'). It is specific but does not explicitly distinguish from sibling tools like tiktok_continue_auth_onboarding, though the verb 'begin' implies it is the initial step.

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?

No guidance is provided on when to use this tool versus related siblings (e.g., continue_auth_onboarding, get_assets_status). The description does not mention context, prerequisites, or alternative tools, leaving the agent to infer usage.

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