list_segments

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

The description labels the tool as 'Read-only', which is a behavioral trait, but no annotations exist. It does not disclose pagination behavior, rate limits, or return format, leaving significant gaps for a list operation.

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 only one line, but it lacks structure and omits important details. It front-loads 'Read-only' effectively, but being too brief reduces its utility.

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 three optional parameters, no output schema, and no annotations, the description is insufficient. It does not explain the return type (e.g., array of segments), pagination, or the relationship between parameters, leaving the agent with incomplete guidance.

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?

All three parameters have descriptions in the input schema (100% coverage), so the baseline is 3. The description adds no additional meaning or usage guidance beyond what the schema provides.

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 'list SendGrid Segments v2 segments', using a specific verb and resource. However, it does not differentiate from the sibling tool 'get_segment', which likely retrieves a single segment, but the distinction is not explicit.

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 'get_segment' or other list tools. The description lacks any context about use cases or exclusions.

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