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. It correctly indicates this is a write/mutation operation ('Set'), but doesn't mention permission requirements, whether changes are reversible, error conditions, or what happens if the cell already has content. The formula syntax tip is helpful but insufficient for comprehensive behavioral understanding.

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 with two sentences that each earn their place. The first sentence states the core purpose, and the second provides essential usage guidance. There's zero wasted language or redundancy, and the information is front-loaded appropriately.

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 5 parameters and no annotations or output schema, the description is adequate but has clear gaps. It covers the basic operation and formula syntax, but doesn't address error handling, permission requirements, or what the tool returns. Given the complexity of spreadsheet operations and lack of structured behavioral annotations, more context would be beneficial.

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 5 parameters thoroughly. The description adds minimal value beyond the schema - it mentions the = prefix for formulas which is already in the value parameter's schema description. No additional parameter context or semantics are provided beyond what's in the structured schema.

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 specific action ('Set a single cell value'), the target resource ('in a standalone spreadsheet'), and distinguishes it from sibling tools like spreadsheet.setCellFormula (which sets formulas specifically) or spreadsheet.setData (which sets multiple cells). The verb+resource combination is precise and unambiguous.

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 clear context about when to use this tool ('Set a single cell value') and includes a specific usage tip about formula syntax ('Use = prefix for formulas'). However, it doesn't explicitly mention when NOT to use it or name alternatives like spreadsheet.setCellFormula for formula-specific operations or spreadsheet.setData for bulk updates.

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