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ohneben

ActiveCampaign MCP

create_a_public_schema

Create a new public schema for custom objects in ActiveCampaign, defining fields and relationships.

Instructions

🟡 WRITE · creates data · Custom Objects · POST /customObjects/schemas/public

Create a public schema

Creates a new record. Not idempotent — calling twice may create duplicates.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
bodyNoRequest body (application/json).
Behavior4/5

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

Annotations already indicate write and non-idempotent behavior. The description adds value by explicitly stating 'creates data' and 'Not idempotent — calling twice may create duplicates', enhancing transparency beyond annotations. 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?

The description is extremely concise: two metadata lines and two sentences. Essential information is front-loaded (WRITE indicator, endpoint), with no extraneous content.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

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

Despite reasonable complexity (nested schema with fields, relationships), the description omits what the tool returns on success, possible errors, or side effects. No output schema exists, so the description should compensate.

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

Parameters3/5

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

With 100% schema description coverage, the input schema already documents the body parameter and its nested properties. The description adds no additional parameter-level meaning, meeting the baseline expectation.

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

Purpose4/5

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

The description clearly states the action (create), resource (public schema), and includes the endpoint path. However, it does not differentiate from sibling tools like create_a_schema or create_a_child_schema, which may cause confusion about when to use this specific tool.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool over alternatives or what prerequisites exist. The description only states the basic purpose and idempotency, but lacks contextual usage instructions.

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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