join_channel

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states that the tool joins a channel but does not disclose whether this is a persistent state change, whether it requires authentication, how to leave the channel, or what effects it has on other operations. The phrase 'to communicate with Figma' is too vague to convey meaningful behavioral traits.

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 concise sentence with no wasted words. It is front-loaded with the action and resource, making it easy to scan. The brevity is appropriate for a tool with minimal parameters.

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 low complexity (one optional parameter, no output schema), the description is still insufficiently complete. It does not explain what a 'channel' is, what 'communicate with Figma' entails, or what the expected outcome of joining a channel is. The agent would be uncertain about how to invoke the tool correctly, especially since the parameter is marked optional in the schema but the description implies a specific channel is needed.

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?

Schema coverage is 100% for the single parameter 'channel', which is described as 'The name of the channel to join'. The tool description adds no further semantic detail beyond the schema. Since the schema fully documents the parameter, a baseline score 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 states the verb 'join' and the resource 'specific channel', but the purpose 'to communicate with Figma' is vague and does not clarify what a 'channel' is in this context. It does not distinguish itself from sibling tools, though none of the siblings involve channels, so confusion is minimal. Overall, the intent is partially clear but lacks specificity.

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, nor does it mention prerequisites or consequences. There is no mention of when joining a channel is appropriate or what other tools might be relevant. This leaves the agent without context for decision-making.

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