reach_listSegmentsV1

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only states that the tool 'returns a list of contact segments,' but does not disclose potential behaviors like pagination, ordering, filtering, or whether it is read-only. Given the simplicity, more detail would be beneficial.

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 two sentences long, direct, and free of unnecessary words. It front-loads the purpose and is easy to scan, achieving ideal conciseness.

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 no output schema and no annotations, the description provides only the core purpose. It does not explain the structure of the returned list or potential errors. For a simple list tool this is adequate but leaves room for improvement, such as mentioning that it returns all segments without pagination.

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 tool has zero parameters, and the input schema is empty with 100% coverage. The description does not need to elaborate on parameters, and its brevity is appropriate. A score of 4 reflects the baseline for no-parameter tools.

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's purpose: 'Get a list of all contact segments.' It uses a specific verb ('Get') and resource ('list of all contact segments'), and distinguishes from sibling tools like reach_createANewContactSegmentV1 and reach_getSegmentDetailsV1, which perform different operations.

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 such as reach_listContactGroupsV1 or other list tools. It does not mention prerequisites, limitations, or scenarios where another tool might be preferred.

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