cigchat_subscriber_set_user_field

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

The description discloses the required 'Manage Flow' scope and the HTTP method/endpoint, which is useful but limited. With no annotations, it does not explain side effects, whether the operation is an upsert, or what the response looks like. Partial transparency.

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 concise and front-loaded, stating the action first, followed by endpoint and scope in a compact format. Each element earns its place without unnecessary fluff.

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 mutating tool with no annotations, no output schema, and only 33% schema parameter coverage, the description is too sparse. It fails to convey return values, side effects, or usage context relative to sibling tools.

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 description adds no explanation for the parameters. The schema describes var_ns (namespace id or name resolution) but leaves value and user_ns undocumented. With schema coverage at only 33%, the description does not compensate.

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 subscriber user field value') and identifies the specific resource. It includes the endpoint and required scope, which adds precision. However, it does not explicitly distinguish itself from sibling tools like set_user_field_by_name.

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 provides no guidance on when to use this tool versus alternatives. It only mentions the required scope, which is a prerequisite rather than usage context. There is no mention of use cases or exclusions.

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