reach_createANewContactSegmentV1

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

No annotations provided. The description only states it creates a segment with criteria, but does not disclose behavior such as idempotency, limits, error handling, or authorization requirements.

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?

Two sentences with no waste. Front-loaded with the action and purpose. Efficiently structured.

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?

No output schema, but the description omits any hint about the response (e.g., returns segment ID). Also lacks prerequisites or constraints like name uniqueness, making it incomplete for an agent to fully understand the tool's outcome.

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 parameters are well-documented in the schema. The description adds minimal extra context by listing example criteria (email, name), but does not significantly enhance understanding beyond the schema.

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 it creates a new contact segment and mentions organizing contacts with criteria. It distinguishes from sibling tools like reach_listSegmentsV1 (list) and reach_getSegmentDetailsV1 (get details), but does not explicitly differentiate from other create tools like reach_createNewContactsV1.

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 explicit guidance on when to use this tool vs alternatives. The description implies segment organization but lacks prerequisites, scenarios, or comparisons with tools like reach_listSegmentsV1 or reach_createNewContactsV1.

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