cigchat_subscriber_set_user_field_by_name

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

With no annotations provided, the description must carry the full burden of behavioral disclosure. It states that the tool 'Set or update' a value and mentions the required scope, but it fails to reveal side effects such as whether it creates missing fields, overwrites existing values, or returns any confirmation. No idempotency or failure behavior is described.

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, front-loaded with the action, and includes the endpoint. It is brief and without redundancy, though it sacrifices substance for brevity.

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 is insufficient for a tool with no annotations, no output schema, and 3 undocumented parameters. It fails to specify the meaning of `user_ns`, differentiate from similar set_user_field variants, or state behavioral outcomes. Given the large family of subscriber and user-field tools, more detail is essential.

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%, and the description does not compensate. It only mentions 'field name' generically but does not explain the meaning of `user_ns`, the relationship between `field_name` and `value`, or how the subscriber is identified. This is a significant gap for a tool with 3 required 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 ('Set or update'), the resource ('subscriber user field value'), and the method ('by field name'). It also includes the endpoint for reference, and the name differentiates it from sibling tools like set_user_field (likely by ID) and set_user_fields_by_name (plural).

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 description offers no explicit guidance on when to use this tool versus alternatives such as cigchat_subscriber_set_user_field or cigchat_subscriber_set_user_fields_by_name. The only contextual clue is the required 'Manage Flow' scope, which is a prerequisite rather than a usage guideline. The phrase 'by field name' implies a use case but does not state exclusions or compare with ID-based methods.

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