reach_createANewContactSegmentV1

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

With no annotations, the description must disclose behavioral traits. It only states 'create' without detailing idempotency, error handling, permissions, or effects on existing segments. The conditions array complexity is hinted but not fully clarified.

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, with two sentences and a title. It starts with the core action and follows with a brief explanation, avoiding unnecessary detail.

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 complexity of the conditions parameter and lack of output schema, the description is incomplete. It does not mention return values (e.g., segment ID), error states, or success confirmation, which are essential for a creation tool.

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 coverage is 100%, so the parameters are documented. The description adds value by listing example criteria (email, name, subscription status), providing context beyond the schema enums. However, it does not explain the conditions array structure or logic parameter usage.

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 tool creates a new contact segment, a specific verb-resource combination. It distinguishes from sibling tools that create individual contacts or list segments, though it could be more precise about the segmentation purpose.

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 provided on when to use this tool versus alternatives like reach_listSegmentsV1 or reach_createANewContactV1. There is no mention of prerequisites or exclusion criteria.

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