AI agents call list_workspace_roles 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 queries workspace role information, which is a non-destructive read operation. It retrieves configuration data about available roles for display or decision-making purposes. The verb 'Get' and 'list' confirm this is a retrieval operation with no capacity to modify, delete, or execute external operations. Severity is low because workspace role enumeration is typically non-sensitive metadata.
From the tool's definition Tool name 'list_workspace_roles' and description 'Get all available workspace roles based on team' indicate retrieval of role metadata without modification or side effects.
Attacks that exploit this kind of access
Get all available workspace roles based on team\. 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 list_workspace_roles: 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.
list_workspace_roles 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_workspace_roles 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_workspace_roles. 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_workspace_roles 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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