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create_formula_field

Create a new formula field in an Airtable table by providing a formula expression or reading from a file. Supports large formulas that exceed LLM output limits.

Instructions

Create a new formula field — shorthand for create_field with type "formula". Use create_field for all other field types (singleSelect, rollup, number, etc.). Returns { columnId }.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
appIdYesThe Airtable base/application ID
tableIdYesThe table ID (e.g. "tblXXX")
nameYesName for the new formula field
formulaTextNoThe formula expression
formulaFilePathNoPath to a local .formula or .fx file. When provided, reads formula from file instead of formulaText (unblocks large formulas that exceed LLM output limits). The # AT: metadata header is stripped automatically.
debugNoWhen true, include raw Airtable response in output for diagnostics
Behavior4/5

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

Description adds context beyond annotations: explains return value {columnId} and behavior of formulaFilePath (strips metadata). No contradictions.

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

Conciseness5/5

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

Two sentences, front-loaded with purpose, 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.

Completeness4/5

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

Given 6 params, no output schema, and minimal annotations, description covers purpose, differentiation, parameter alternatives, and return value. Lacks permissions or error info, but sufficient for typical use.

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

Parameters4/5

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

With 100% schema coverage, baseline is 3. Description adds value by explaining formulaFilePath as alternative to formulaText and debug flag purpose, lifting score to 4.

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

Purpose5/5

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

Clearly states 'Create a new formula field' and explicitly distinguishes from sibling create_field by specifying it's a shorthand for formula type only.

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

Usage Guidelines5/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Explicitly tells when to use this tool vs create_field (formula vs other types) and explains the formulaFilePath alternative for large formulas.

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

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