reach_createANewContactSegmentV1

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

No annotations provided, so the description bears full burden. It mentions creating a segment with criteria but does not disclose side effects (e.g., overwrites existing segment with same name?), required permissions, idempotency, or whether it returns the created segment. Minimal behavioral insight.

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?

Three sentences, front-loaded with purpose. No fluff. Every sentence adds value: main action, general context, example criteria. Efficient and well-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, so description should hint at return value; it does not. Missing prerequisites, whether duplicate names are allowed, or success/error handling. Compared to the complexity of conditions array, the description is incomplete for agent decision-making.

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% but schema descriptions are generic ('name parameter'). The description adds context that conditions can include email, name, subscription status, etc., and implies logic with AND/OR. This adds some semantic value beyond the schema, but not extensive.

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 and mentions its purpose of organizing contacts with criteria. It distinguishes from siblings like listSegments or getSegmentDetails, but does not explicitly differentiate from reach_createANewContactV1 (which creates a contact), so a slight deduction.

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 on when to use this tool versus alternatives, such as when to create a segment vs. list or modify existing ones. No mention of prerequisites or scenarios where this tool is appropriate.

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