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karbassi

slack-mcp

by karbassi

conversations_external_invite_permissions_set

Set external invite permissions for a Slack Connect channel: upgrade to allow external write access, or downgrade to restrict it.

Instructions

Set external invite permissions for a Slack Connect channel.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
channelYesID of the Slack Connect channel (e.g. C0123).
actionYesPermission to apply — ``upgrade`` to allow external write access or ``downgrade`` to restrict it.

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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. It implies a write operation ('set') but offers no details about required permissions, reversibility, side effects, or the impact of upgrade/downgrade. The schema partly compensates for action semantics but not for behavioral traits.

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

Conciseness5/5

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

The description is a single, front-loaded sentence that immediately conveys the core purpose. Every word is efficient, with no filler or redundancy.

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

Completeness2/5

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

Despite having an output schema and full parameter documentation, the description lacks usage guidelines, behavioral context, and differentiation from siblings. Given the tool's role in a complex domain (Slack Connect permissions), the current description is incomplete for confident agent invocation.

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?

Schema description coverage is 100%, with both channel and action parameters well-described in the schema. The tool description adds no extra semantic value beyond what is already in the input schema, so the baseline score of 3 is appropriate.

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 tool sets external invite permissions for a Slack Connect channel, using a specific verb and resource. It is not a tautology and distinguishes the tool from siblings by focusing on permissions rather than inviting or approving. However, it lacks nuance about the scope or effects.

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?

The description provides no guidance on when to use this tool versus related tools like conversations_approve_shared_invite or conversations_list_connect_invites. There are no usage conditions or alternatives mentioned, leaving the agent without decision support.

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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