slack_get_user_info

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

With no annotations provided, the description carries the full burden of behavioral disclosure. The verb 'Get' implies a read-only operation and the Returns section indicates what kind of data to expect, but the description does not mention error behavior, permission requirements, or other call traits. This is adequate but minimal.

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 and well-structured with a short summary followed by Args and Returns sections. Every line provides useful information, and the parameter format detail is included without unnecessary verbosity.

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 lookup tool with an output schema, the description covers the key information an agent needs: what the tool does, what its parameter is, and what kind of data it returns. It is slightly incomplete on usage distinctions and behavioral caveats, but the simple scope makes it mostly self-sufficient.

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 only declares `user_id` as a string with no description, giving 0% schema coverage. The description compensates by explaining the expected format ('starts with U, W, or B'), which adds meaningful guidance beyond the schema for this single parameter.

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 the action ('Get information') and resource ('a Slack user'), and it lists concrete return fields like name, email, status, and timezone. However, it does not distinguish this tool from the closely related sibling `slack_get_user_profile`, which likely overlaps in purpose.

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 such as `slack_get_user_profile` or `slack_list_users`. There are no explicit conditions, exclusions, or references to sibling tools, so an agent must infer the appropriate context from the name alone.

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