list_post_type_fields
List the custom field schema for a post type. Use this before creating posts to know which keys to pass in meta and what types they expect.
This record as markdown: /tools/io-favcrm-favcrm/list-post-type-fields.md
What list_post_type_fields does on FavCRM
AI agents call list_post_type_fields to retrieve information from FavCRM without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
postTypeId | string | Yes | Post type ID (from list_post_types) |
Parameters from the server's own tool schema.
Why list_post_type_fields is rated Low
This tool retrieves and queries field schema information to inform subsequent operations. It performs no data creation, modification, deletion, or external execution. It is purely informational, used to understand data structure before other operations.
From the tool's definition Tool name 'list_post_type_fields' and description 'List the custom field schema for a post type' indicates retrieval of schema metadata without side effects.
Attacks that exploit this kind of access
The rule that runs list_post_type_fields safely
PolicyLayer is an MCP gateway: it sits between your AI agents and FavCRM, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For list_post_type_fields, this is the rule to start with:
list_post_type_fields is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect FavCRM, apply this rule, and every list_post_type_fields call is checked against it from then on.
Questions about list_post_type_fields
List the custom field schema for a post type. Use this before creating posts to know which keys to pass in meta and what types they expect. It is categorised as a Read tool in the FavCRM MCP Server, which means it retrieves data without modifying state.
list_post_type_fields accepts 1 parameter: postTypeId. Required: postTypeId. The full parameter table on this page comes from the server's own tool schema.
Register the FavCRM MCP server in PolicyLayer and add a rule for list_post_type_fields: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches FavCRM. Nothing to install.
list_post_type_fields is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list_post_type_fields rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for list_post_type_fields. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
list_post_type_fields is provided by the FavCRM MCP server (https://api.favcrm.io/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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