list_billing_groups

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

No annotations are provided, so the description carries the full burden. It indicates a read operation (GET) and describes the optional parameter. However, it does not disclose pagination, authentication requirements, rate limits, or behavior when no groups exist. The disclosure is minimal but not misleading.

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 extremely concise: two sentences. The first states the purpose and endpoint, the second describes the parameter. No filler or redundant information; every word serves a purpose.

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 that an output schema exists (not shown), the description need not detail return values. It covers the core functionality and parameter semantics. It lacks mentions of team context or authorization, but for a straightforward list tool, it is largely complete.

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 input schema has 0% coverage (no description in schema), but the tool description adds valuable meaning: it specifies that billing_cycle is an optional ISO date (YYYY-MM-DD) with a default of the current cycle. This goes beyond the schema's 'string or null' type and title.

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 lists billing groups for the team and includes the HTTP endpoint (GET /teams/groups), differentiating it from siblings like list_organization_groups (organization-level) and get_billing_group (single group). The verb 'list' and resource 'billing groups' are specific and unambiguous.

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 does not provide any guidance on when to use this tool versus alternatives. Sibling tools include list_organization_groups, get_billing_group, and create_billing_group, but no criteria for selection (e.g., team vs. organization scope, listing vs. retrieving a single group) are mentioned.

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