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conarti

Mattermost MCP Server

by conarti

mattermost_get_thread_replies

Retrieve all replies in a message thread by providing the channel ID and post ID.

Instructions

Get all replies in a message thread

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
channel_idYesThe ID of the channel containing the thread
post_idYesThe ID of the parent message
Behavior3/5

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

No annotations are provided, so the description carries the full burden. It implies a read-only operation ('get'), but does not disclose whether it requires specific permissions, is idempotent, or returns paginated results. Adequate but lacks depth.

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 clear sentence with no wasted words. It is front-loaded with the key action and resource.

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 retrieval tool with 2 parameters, no output schema, and no annotations, the description is minimally adequate. It does not explain the format of replies, pagination, or limits, leaving some gaps.

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% (both parameters have descriptions). The tool description adds no extra meaning beyond 'get all replies'. Baseline 3 is appropriate as the schema already explains the parameters adequately.

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 'Get all replies in a message thread' uses a specific verb ('get') and resource ('replies'), clearly distinguishing it from sibling tools like 'mattermost_reply_to_thread' (which creates a reply) and 'mattermost_post_message' (which posts a new message).

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 vs alternatives, lacks exclusions, and does not mention prerequisites. The sibling tool list is provided but without any comparative context.

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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