Get fields from a specific GraphQL type
AI agents call types to retrieve information from GraphQL Schema Explorer without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves and queries GraphQL schema information without creating, modifying, deleting, or executing any data or operations. It is purely informational inspection of API structure, making it a Read category tool with low severity risk.
From the tool's definition Tool name 'types' and description 'Get fields from a specific GraphQL type' indicate read-only introspection of schema metadata.
Attacks that exploit this kind of access
Get fields from a specific GraphQL type. It is categorised as a Read tool in the GraphQL Schema Explorer MCP Server, which means it retrieves data without modifying state.
Register the GraphQL Schema Explorer MCP server in PolicyLayer and add a rule for types: 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 GraphQL Schema Explorer. Nothing to install.
types 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 types 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 types. 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.
types is provided by the GraphQL Schema Explorer MCP server (martinshumberto/mcp-server-graphql). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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