AI agents call get_schema_file_contents to retrieve information from Postman 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 the contents of a schema file, which is a read-only operation with no side effects. It does not create, modify, delete, or execute anything. The minimal blast radius and non-destructive nature warrant a 'low' severity classification.
From the tool's definition Tool name 'get_schema_file_contents' and description 'Get contents of a schema file' indicate retrieval of existing data with no modification, deletion, or execution.
Attacks that exploit this kind of access
Get contents of a schema file. It is categorised as a Read tool in the Postman MCP Server, which means it retrieves data without modifying state.
Register the Postman MCP server in PolicyLayer and add a rule for get_schema_file_contents: 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 Postman. Nothing to install.
get_schema_file_contents 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 get_schema_file_contents 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 get_schema_file_contents. 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.
get_schema_file_contents is provided by the Postman MCP server (postmanv3/postman-mcp-server). 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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