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. The description only mentions billing and payment methods ($0.01 via x402/MPP, no API key). It does not state whether the operation is read-only, what side effects might occur, rate limits, authorization requirements, or what the response contains. There is zero behavioral context.

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 very short, so it is concise in length, but it is not structured well. It opens with a category label and then discusses billing, omitting the critical 'what does this tool do' information. It under-specifies rather than being appropriately concise; there is no front-loading of the primary 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 there are no annotations and no output schema, the description is drastically incomplete. It does not explain the tool's function, input requirements beyond the schema, output format, or any usage context. For a tool with 4 parameters and a likely list-returning role, this is severely inadequate.

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 description offers no parameter information whatsoever. The schema provides some descriptions (id and username have mutual exclusion, count has max), but cursor is simply labeled 'Cursor token' with no explanation of its purpose. Since schema coverage is only 75% (not high), the description should have helped clarify parameter usage but completely ignores it.

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 says 'User Following IDs Group: User' which is a noun phrase, not an action. It does not explicitly state that the tool retrieves the IDs of users a given user follows. It provides no verb or resource action, and it doesn't differentiate from siblings like get_v1_1_FollowersIds. The purpose is vague and mostly repeats the title.

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?

There is no guidance on when to use this tool vs alternatives. It does not mention that this returns IDs only, or that it targets the 'following' relationship versus 'followers' or 'full user objects'. There are no exclusions or alternative tool references, leaving the agent to guess.

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