List all registered action types. Action types define what operations can be performed on objects.
AI agents call dual_list_action_types to retrieve information from DUAL MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves and enumerates action type definitions from the system. It has no side effects, does not execute actions, and does not modify data. This is a straightforward informational query, fitting the Read category. Severity is low because the information returned is metadata about the system's capabilities, not sensitive user data or financial information.
From the tool's definition Tool name contains 'list' and description states 'List all registered action types' — this is a retrieval operation that queries metadata about available operations without modifying or executing any of them.
Attacks that exploit this kind of access
List all registered action types. Action types define what operations can be performed on objects. It is categorised as a Read tool in the DUAL MCP Server MCP Server, which means it retrieves data without modifying state.
Register the DUAL MCP Server MCP server in PolicyLayer and add a rule for dual_list_action_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 DUAL MCP Server. Nothing to install.
dual_list_action_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 dual_list_action_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 dual_list_action_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.
dual_list_action_types is provided by the DUAL MCP Server MCP server (ro-ro-b/dual-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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