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thincms_create_form

Create forms or surveys with field definitions or custom HTML. Use presets for quick setup and configure webhooks for submissions.

Instructions

Create a new form or survey. Use renderMode 'fields' for standard forms (with field definitions) or 'html' for custom HTML surveys served at /s/:slug. Use preset 'contact' or 'newsletter' for pre-configured field sets. For large HTML content (>10KB), use htmlContentFile instead of htmlContent to pass a local file path.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
nameYesForm name (required)
slugNoURL slug (auto-generated from name if omitted)
fieldsNoField definitions (for renderMode 'fields')
presetNoPre-configured field set
siteIdNoOverride the active site for this single call. Pass to target a specific tenant without mutating shared active-site state — the right pattern when running concurrent agent sessions managing different tenants. Must match a siteId from your THINCMS_SITES config (use thincms_list_sites to inspect). When omitted, the call uses the active site set by thincms_switch_site.
enabledNoEnable/disable form (default: true)
renderModeNo'fields' for standard forms, 'html' for custom survey HTML (default: fields)
webhookUrlNoURL to receive submission payloads via POST
descriptionNoForm description
htmlContentNoCustom HTML content (for renderMode 'html', served at /s/:slug)
successMessageNoMessage shown after successful submission
webhookUrlTestNoTest webhook URL (auto-deactivates after one delivery)
htmlContentFileNoLocal file path containing HTML content — use this instead of htmlContent for large surveys (>10KB). The file is read and sent as htmlContent.
webhookTestModeNoEnable test mode for webhook
confirmProductionWriteNoAcknowledge that this call may write to a configured production site (THINCMS_PRODUCTION_SITE_IDS env var). Required for any POST/PUT/PATCH/DELETE against a production-listed site; ignored otherwise. The error message lists which site triggered the requirement and recommends thincms_snapshot before any production write.
Behavior4/5

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

With no annotations provided, the description carries full burden. It discloses that HTML surveys are served at /s/:slug and that htmlContentFile relates to file paths for large content. However, it doesn't mention side effects like enabling/disabling defaults or triggering webhooks, leaving some behavioral gaps.

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 three sentences, each providing distinct, necessary information. It is front-loaded with the core verb and resource, and every sentence provides actionable guidance without redundancy.

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?

Despite lacking an output schema, the description covers core functionality and key parameters. However, it does not mention what the tool returns upon creation (e.g., form ID or confirmation), which would be helpful for an agent using the result. It also omits important contextual details like the siteId parameter's role (though described in schema). Overally, quite complete for a creation tool.

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?

Schema coverage is 100% so baseline is 3. The description adds value by explaining the purpose of renderMode, preset, and the trade-off between htmlContent and htmlContentFile. It also mentions auto-generation of slug, which goes beyond schema descriptions.

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?

The description clearly states 'Create a new form or survey' and distinguishes between two render modes ('fields' for standard forms, 'html' for custom HTML surveys). It also mentions presets for pre-configured fields, making the purpose specific and distinct from sibling create tools.

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?

The description provides explicit guidance on when to use each renderMode and preset, and advises using htmlContentFile for large HTML content instead of htmlContent. This effectively tells the agent when to use different options, though it doesn't compare to siblings but that's unnecessary as this is the only form creation tool.

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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