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karbassi

slack-mcp

by karbassi

pins_list

List pinned items in a Slack channel. Optionally request detailed responses with metadata.

Instructions

List items pinned to a channel. Set detailed=True for full response.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
channelYes
detailedNo

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior2/5

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

No annotations are provided, and the description only implies a read operation by saying 'List'. It does not explicitly declare read-only nature, permissions, or side effects, leaving behavior under-specified.

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 extremely concise: two sentences with no redundant information. Purpose is front-loaded, and the parameter hint is directly relevant.

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?

For a simple tool with two parameters and an output schema, the description covers basic usage. However, the lack of behavioral disclosure (read-only, permissions) and missing channel explanation leaves some gaps for full context.

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 description adds meaning for the 'detailed' parameter ('Set detailed=True for full response'), but the 'channel' parameter is not explained. With 0% schema description coverage, some compensation is provided but incomplete.

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

Purpose5/5

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

The description clearly states the tool lists items pinned to a channel, using a specific verb and resource. It distinguishes from sibling tools like pins_add and pins_remove by its focus on listing.

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 a hint about the detailed parameter but does not offer guidance on when to use this tool versus alternatives (e.g., pins_add, pins_remove). No explicit context for selection.

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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