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cloud-ru-tech

mcp-server-mattermost

list_public_channels

Read-onlyIdempotent

List all public channels in a team, including those you haven't joined, to discover and join channels. Results are paginated for efficient retrieval.

Instructions

List public channels available in a team.

Returns all public channels for discovery, including ones you haven't joined. Results are paginated. Use page/per_page to retrieve all channels. Useful for finding channels to join. For channels you are already a member of (including private), use list_my_channels.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
pageNoPage number (0-indexed)
team_idYes26-character team identifier (e.g., 'o5w8h47pdfbzjc4d8w7dhnhren')
per_pageNoResults per page

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault
resultYes
Behavior4/5

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

Annotations already declare readOnlyHint and idempotentHint. Description adds pagination behavior and scope (including unjoined channels), which are useful beyond annotations. No contradictions.

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?

Three sentences, no wasted words, front-loaded with the main purpose. Efficient and easy to scan.

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

Completeness4/5

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

Output schema exists, so return values are handled. Description covers the essential: what is returned, pagination, and scope. Could mention that team_id is required, but that's already in schema. Still complete enough.

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 coverage is 100%, so baseline is 3. Description mentions page and per_page in context of pagination, but does not add details beyond schema (e.g., defaults, bounds). Minimal added value.

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?

Clearly states it lists public channels for discovery, including unjoined ones. Distinguishes from sibling list_my_channels which returns channels the user is a member of. Verb+resource is explicit.

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

Usage Guidelines4/5

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

Explicitly states when to use: for finding channels to join. Provides exclusion: use list_my_channels for channels you are already a member of. Could mention more alternatives but sufficient.

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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