Join Channel

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

Annotations already mark the tool as open-world and idempotent. The description adds 'establish the live connection,' which hints at a setup action but omits details like behavior if the channel doesn't exist, whether it replaces an existing connection, or error states. It provides minimal extra value beyond the annotations.

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

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

The description is a single, well-formed sentence that immediately conveys the tool's core action. It is front-loaded with the verb 'Join' and contains no extraneous information. Every word earns its place.

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

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

Given the tool's simplicity (one parameter, no nested objects, existing output schema), the description covers the basic action. However, it lacks context about when joining is necessary, whether it's a one-time setup, or what happens if already joined. These gaps reduce completeness despite the low complexity.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

With 100% schema description coverage and only one parameter ('channel'), the description adds no additional meaning beyond the schema's 'The name of the channel to join.' The baseline of 3 is appropriate.

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

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

The description uses a specific verb 'Join' and resource 'plugin channel' to clearly state the tool's purpose: establishing a live connection to the Figma document. This distinctly separates it from sibling tools, which focus on nodes, components, styles, etc.

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

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 alternatives, no prerequisites or conditions for invoking it, and no indication of whether it must be called before other operations. The agent is left to infer usage context.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.