Circuitry MCP Server

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

With no annotations provided, the description carries full burden for behavioral disclosure. It mentions the ability to set formulas, which is useful context, but fails to describe important behavioral aspects: whether this is a write operation (implied but not stated), what permissions are required, whether it overwrites existing content, what happens with invalid coordinates, or what the tool returns. For a mutation tool with zero annotation coverage, this is inadequate.

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 perfectly concise - two brief sentences with zero wasted words. The first sentence states the core purpose, the second adds important capability information. Every word earns its place, and the structure is front-loaded with the most critical information.

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 mutation tool with no annotations and no output schema, the description is incomplete. It doesn't address key contextual questions: what happens on success/failure, what permissions are needed, how it interacts with other sheet operations, or what the return value looks like. The sibling tools list shows many related sheet operations, but the description provides no guidance on when to choose this specific tool.

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 description coverage is 100%, so the schema already documents all four parameters thoroughly. The description adds minimal value beyond the schema by mentioning formula support ('Can also set formulas (start with =)'), which slightly elaborates on the 'value' parameter. This meets the baseline expectation when schema does the heavy lifting.

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 action ('Set a single cell value') and resource ('in a Sheet'), making the purpose immediately understandable. It distinguishes from siblings like sheet.setCells (multiple cells) and sheet.setCellFormula (formula-specific), though not explicitly named. However, it doesn't fully differentiate from spreadsheet.setCell which appears to be a similar tool in a different context.

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 like sheet.setCells (for multiple cells), sheet.setCellFormula (for formulas only), or spreadsheet.setCell (apparently similar). There's no mention of prerequisites, error conditions, or typical use cases beyond the basic functionality.

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