unfollow_user

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

With no annotations, description must disclose all behavioral aspects. It mentions rate-limiting and potential temporary restriction, which is valuable. But it does not disclose whether the user must be followed beforehand, what happens if the screen name does not exist, or any side effects beyond the warning.

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?

Extremely concise: two sentences and a one-line Args description. No extraneous information; front-loaded with the action.

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?

For a simple one-parameter tool with an output schema, the description provides the essential: action, parameter format, and a usage warning. Missing prerequisites (e.g., must be following) but still fairly 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?

Only parameter 'screen_name' is explained with format hint ('without @'), which adds value beyond the schema (which only specifies type string). Schema coverage is 0% but the description compensates.

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?

Description specifies the action ('Unfollow a user') and the method ('by screen name'). Clearly distinguishes from sibling 'follow_user'.

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?

Provides rate-limit warning and advises against bulk usage, giving clear context for appropriate use. However, does not explicitly state when not to use this tool (e.g., if not currently following the user) or mention alternatives.

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