Circuitry MCP Server

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. While 'create' implies a write/mutation operation, the description doesn't address important behavioral aspects like: what happens if a chart with the same name already exists, whether this requires specific permissions, where the created chart appears in the interface, or what the expected response format is. For a creation tool with zero annotation coverage, this represents significant gaps in behavioral transparency.

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 extremely concise - a single sentence that gets straight to the point without any wasted words. It's front-loaded with the essential information (create a chart/visualization node) and doesn't include unnecessary elaboration. This is an excellent example of efficient communication.

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?

For a creation tool with 4 parameters, no annotations, and no output schema, the description is insufficiently complete. It doesn't explain what happens after creation, where the chart appears, how it integrates with other tools, or provide any context about the charting system. The agent would need to guess about important aspects like whether the chart is immediately visible, editable, or how to reference it later.

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?

The schema description coverage is 100%, so all parameters are documented in the schema itself. The description adds no additional parameter information beyond what's already in the schema - it doesn't explain what 'chart data configuration' should contain, how 'position' coordinates work, or provide examples of valid chart configurations. With complete schema coverage, the 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 clearly states the verb ('create') and resource ('chart/visualization node'), making the purpose immediately understandable. However, it doesn't distinguish this tool from similar creation tools like 'html.create', 'image.create', 'screen.create', or 'text.create' that also create visual elements, leaving some ambiguity about when to choose this specific chart creation tool.

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. With multiple creation tools available (chart.create, html.create, image.create, screen.create, text.create, etc.), there's no indication of what makes this chart creation tool distinct or when it should be preferred over other visualization creation methods.

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