cigchat_subscriber_opt_out_email

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

With no annotations, the description carries the full burden of behavioral disclosure. It mentions the required 'Manage Flow' scope, which is useful, but it does not describe the actual side effects (e.g., whether it permanently unsubscribes the user, whether it is reversible, or whether it sends a confirmation). The mutation nature is implied by 'opt-out' but not made explicit.

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 extremely short but is under-specified rather than concise. It is a fragment ('Opt-out Email') followed by an endpoint and a scope note, lacking a proper sentence structure or any elaboration that would help the agent.

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 of the tool (one parameter), the description is not completely unmanageable, but it fails to provide necessary context such as what user_ns refers to, what the endpoint does to the subscriber, and how it differs from related tools like opt_in_email or opt_out_sms. The lack of output schema and annotations makes this information gap more significant.

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 input schema has one required parameter, user_ns, with zero description coverage. The tool description does not explain what user_ns means or how to supply it, leaving the agent entirely without semantic guidance for the parameter.

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 'Opt-out Email [DELETE /subscriber/opt-out-email]' essentially restates the tool name with an endpoint, providing little beyond a tautological label. It does not clearly state that this opts a subscriber out of email communications, and it fails to distinguish it from sibling tools like cigchat_subscriber_opt_in_email or cigchat_subscriber_opt_out_sms.

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 given about when to use this tool versus alternatives. The only contextual clue is the required scope, but there is no mention of prerequisites, effects on subscribers, or when opting out by email is appropriate versus other opt-out mechanisms.

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