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

With no annotations provided, the description carries full responsibility for behavioral disclosure. It does explain cursor/count navigation and mentions the TimelineTimelineCursor objects, which is useful. However, it omits auth requirements, potential side effects, and any specifics about the response structure. This is adequate but not rich.

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 the core purpose stated first ('Receive all followings of a user') and navigation hints following. There is no fluff, but it could arguably be more informative without losing conciseness. It earns a high score for efficiency.

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 lack of annotations, output schema, and the existence of sibling tools that differ (basic vs ids), this description is incomplete. It does not explain what distinguishes this variant, what the response looks like, or any access requirements. The pagination hint is helpful but insufficient for full contextual understanding.

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 coverage is 75% (count, cursor, username are documented), and the description adds a sentence about using cursor and count for navigation, which reinforces their combined use. The username override is only in the schema, not mentioned in the description. Overall, the description adds minimal value beyond the schema, so a baseline 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 states 'Receive all followings of a user', which is a clear verb+resource. It does not explicitly differentiate from sibling tools like get_user_userId_followings_basic or get_user_userId_followings_ids, though the name itself implies a full followings list. This is clear but not fully distinguishing.

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 followings_basic or followings_ids. The only usage hint is about pagination with cursor and count, but there is no mention of selection criteria or exclusions. This leaves the agent without context for tool choice.

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