Follow a TikTok user

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

No annotations are provided, so the description carries the full burden. It states the action but does not disclose potential side effects, whether the action is reversible, authentication requirements, or what happens if the target user is already followed. This is a significant gap for a mutation tool.

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 clear sentence with no redundant wording. Every word serves a purpose, making it highly concise and easy to parse.

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 tool with no output schema and no annotations, the description is under-specified. It lacks information about expected outcomes, error conditions, or edge cases (e.g., following an already-followed user). The prerequisite of a connected local profile is mentioned but not elaborated.

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 50% (account_id has a format description, target_user has none). The tool description does not explicitly map parameters to the account_id and target_user roles; 'connected local profile' hints at account_id but leaves target_user unclarified. The description adds minimal value beyond the schema.

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 a specific action verb ('Follow') and identifies both the resource ('a user') and the context ('from a connected local profile'), clearly distinguishing it from sibling tools like tiktok_like and tiktok_post. It fully clarifies what the tool does.

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 phrase 'from a connected local profile' implies a prerequisite, indicating that the tool should be used only after connecting a local profile. However, it offers no explicit guidance on when to use this tool versus alternatives, nor does it state exclusions or conditions.

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