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karbassi

slack-mcp

by karbassi

conversations_kick

Remove a specified user from a Slack channel by providing the channel ID and user ID.

Instructions

Remove a user from a conversation.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
channelYesID of the channel to remove the user from (e.g. C0123).
userYesID of the user to remove (e.g. U0123).

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior1/5

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

With no annotations, the description carries full burden but only states the basic action. It fails to disclose any behavioral traits such as permission requirements, immediate effects, or side effects like notifications or conversation state changes.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness4/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely concise (5 words) and to the point. It sacrifices detail for brevity, but every word is necessary.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's low complexity (2 parameters, simple action) and the presence of an output schema (though not provided), the description arguably covers the essential purpose. However, it lacks explicit mention of return behavior or error conditions.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema covers both parameters with clear descriptions. The description adds no additional meaning beyond the schema, resulting in the baseline score for high coverage.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the action ('Remove a user from a conversation') with a specific verb and resource. It implicitly distinguishes from related tools like conversations_invite or conversations_leave, but could explicitly differentiate.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance on when to use this tool versus alternatives such as conversations_leave or conversations_invite. No prerequisites, context, or exclusions provided.

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

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