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

No annotations are present, so the description carries the full burden of behavioral disclosure. It only mentions billing/payment and does not describe what the call does, what it returns, pagination behavior, or authentication needs beyond 'no API key'.

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 text is short but not meaningfully concise: it spends characters on billing instead of defining the tool's behavior. This reads as under-specification rather than efficient front-loaded content.

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?

There is no output schema and no annotation support, yet the description omits return format, pagination handling, and the one-of requirement. The tool name and schema hint at the purpose, but the description alone is not enough for an agent to invoke it confidently.

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 description coverage is 75%, and the schema already documents the id/username mutual exclusion, count max, and examples. The description itself adds no parameter-level meaning, but with high schema coverage the baseline of 3 is appropriate.

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 repeats the title 'User Followers IDs' and adds only 'Group: User' plus billing information. There is no verb or explicit statement of what resource is retrieved or how it differs from siblings like get_v1_1_Followers or get_v1_1_FollowingIds.

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 gives no guidance on when to use this tool versus alternatives. Sibling tools with overlapping purposes exist, but no exclusionary or alternative routing information is provided.

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