Navigate to the public directory of registered agents (ERC-8004) operating on Execution Market.
AI agents call em_view_agent_directory to retrieve information from Execution Market without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves public information about registered agents from a directory. It does not create, modify, delete, or execute any operations; it simply queries and displays existing public data. Even in the context of a financial/payments platform, viewing a public directory poses minimal risk — it is purely informational with no side effects or capability to affect funds, tasks, or system state.
From the tool's definition Tool name includes 'view' and description states 'Navigate to the public directory of registered agents' — a read-only retrieval of public directory information with no state modification.
Attacks that exploit this kind of access
Navigate to the public directory of registered agents (ERC-8004) operating on Execution Market. It is categorised as a Read tool in the Execution Market MCP Server, which means it retrieves data without modifying state.
Register the Execution Market MCP server in PolicyLayer and add a rule for em_view_agent_directory: 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 Execution Market. Nothing to install.
em_view_agent_directory 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 em_view_agent_directory 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 em_view_agent_directory. 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.
em_view_agent_directory is provided by the Execution Market MCP server (https://mcp.execution.market/mcp/). 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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