get_schema

Get a specific schema from components/schemas by name. Supported internal component $refs are resolved inline. Use get_types to convert schemas to TypeScript type declarations.

ServerApifable
CategoryRead

How to control get_schema ↓

WHAT IT DOES

What get_schema does on Apifable

AI agents call get_schema to retrieve information from Apifable without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

THE RISK

Low Risk

Why get_schema needs a policy

This tool retrieves and returns schema definitions from an OpenAPI specification. It performs no side effects, does not modify data, does not execute arbitrary code or commands, and does not delete or destroy data. It is purely informational, helping developers understand API structure through schema introspection. This is a classic Read category operation with minimal security risk.

From the tool's definition Tool description explicitly states 'Get a specific schema from components/schemas by name' with schema resolution and conversion support.

Documented attack patterns abuse exactly the kind of access get_schema gives an agent:

POLICY

How to control get_schema

PolicyLayer is an MCP gateway — it sits between your AI agents and Apifable, and nothing reaches the server without passing your rules. This is the rule we recommend for get_schema:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "get_schema": {}
  }
}

get_schema is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register Apifable — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

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EXPLORE

Related tools and policies

More Apifable tools

Read get_endpoint Get full details of a specific endpoint including parameters, request body, responses, and Read get_spec_info Get general information about the OpenAPI spec: title, version, description, servers, secu Read get_types Generate self-contained TypeScript type declarations for specified schemas or for all sche Read list_endpoints_by_tag List all endpoints belonging to a specific tag. Use get_spec_info first to see available t Read search_endpoints Search endpoints by keyword across operationId, path, summary, and description. Results ar Read search_schemas Search schemas by keyword across schema name and description. Results are ranked by releva

All 7 Apifable tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about get_schema

What does the get_schema tool do? +

Get a specific schema from components/schemas by name. Supported internal component $refs are resolved inline. Use get_types to convert schemas to TypeScript type declarations. It is categorised as a Read tool in the Apifable MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on get_schema? +

Register the Apifable MCP server in PolicyLayer and add a rule for get_schema: 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 Apifable. Nothing to install.

What risk level is get_schema? +

get_schema is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit get_schema? +

Yes. Add a rate_limit block to the get_schema 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.

How do I block get_schema completely? +

Set action: deny in the PolicyLayer policy for get_schema. 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.

What MCP server provides get_schema? +

get_schema is provided by the Apifable MCP server (ycs77/apifable). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Apifable tool call.

Start from Apifable, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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7 Apifable tools catalogued and risk-classified — across an index of 43,000+ MCP servers.