cigchat_subscriber_add_labels_by_name

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 auth requirement ('Requires the Manage Flow scope') and the limit ('up to 20 labels'), which are useful behavioral constraints. However, it does not describe side effects, idempotency, error behavior, or what happens if limits are exceeded. The verb 'Add' conveys mutation, but details are lacking.

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 sentence that packs the core action, limit, endpoint, and auth requirement with no fluff. Every element serves a purpose, making it highly efficient and front-loaded.

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?

The description covers the basic operation but omits crucial context: what `user_ns` means, how the subscriber is identified, the expected format of `data`, response behavior, and error handling. With no output schema and sparse parameter documentation, an agent would likely struggle to invoke this correctly without additional assumptions.

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 must compensate. It clarifies that `data` contains label names implicitly via 'by label name', but it does not explain the `user_ns` parameter at all, nor the structure of `data` beyond labels. The odd schema with `anyOf` and `not` is not addressed. Significant ambiguity remains for 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 ('Add labels by label name to subscriber'), the resource (labels), the target (subscriber), and a key constraint ('up to 20 labels'). It distinguishes this from sibling tools like remove_labels_by_name and add_tags_by_name by specifying label-by-name semantics.

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 usage guidance is provided beyond the required 'Manage Flow' scope. The description does not mention when to use this tool versus alternative label/tag operations, nor does it specify any exclusions or context for choosing this tool over siblings like add_tags_by_name or remove_labels_by_name.

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