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figma-free-mcp

figma-free-mcp

by haju-xp
OverviewSchemaSourceRelated ServersDiscussionsAdmin
TypeScript
Local

join_channel

Join a Figma channel to start communicating and collaborating with your team on designs.

Instructions

Join a specific channel to communicate with Figma

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "channel": "<channel>"
    },
    "name": "join_channel"
  }
}

Input Schema

NameRequiredDescriptionDefault
channelYesThe name of the channel to join

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv1.0.13

TDQS

C2.8/5.0
Behavior2/5

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

Annotations are absent, so the description must disclose side effects, permissions, or state changes. It only says 'join' and 'communicate', with no indication of what happens upon joining, whether it's reversible, or if any permissions are required. This is insufficient for a mutation tool.

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

Conciseness3/5

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

The description is very short (one sentence), which risks under-specification. While it avoids fluff, it omits crucial details, making it less effective. It is concise but incomplete.

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?

Given the lack of annotations and output schema, the description should provide more context about return values, side effects, and prerequisites. For a state-changing tool like 'join_channel', this description is inadequate.

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 already describes the sole parameter ('channel') with full coverage (100%). The description adds no additional semantic value beyond what the schema provides, so a 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 action (join) and the resource (channel). However, the phrase 'to communicate with Figma' is vague; it doesn't specify what joining a channel entails. Nonetheless, the core purpose is evident and distinct from sibling tools.

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 is provided on when to use this tool versus alternatives. For instance, there is a sibling 'list_active_channels' that might be a prerequisite, but no hints are given. The description offers no usage context or exclusions.

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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