Medium Risk

em_register_identity

Register a new ERC-8004 identity on-chain (gasless via Facilitator). The Facilitator pays all gas fees. The minted ERC-721 NFT is transferred to the specified wallet address. Args: wallet_address: Wallet address to register and receive the NFT mode: Must be "gasless" (only supported mode) network...

Part of the Execution Market server.

em_register_identity can modify Execution Market data, with no limits today. PolicyLayer puts allow, deny, and rate-limit rules on every call. Live in minutes.

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AI agents use em_register_identity to create or modify resources in Execution Market. Write operations carry medium risk because an autonomous agent could trigger bulk unintended modifications. Rate limits prevent a single agent session from making hundreds of changes in rapid succession. Argument validation ensures the agent passes expected values.

Without a policy, an AI agent could call em_register_identity repeatedly, creating or modifying resources faster than any human could review. PolicyLayer's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Execution Market.

Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "em_register_identity": {
      "limits": [
        {
          "counter": "em_register_identity_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

See the full Execution Market policy for all 38 tools.

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These attack patterns abuse exactly the kind of access em_register_identity gives an agent. Each links to the full case and the policy that stops it:

Browse the full MCP Attack Database →

Every attack above starts with a tool call. PolicyLayer checks each one against your policy first, so em_register_identity only ever does what you allow.

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Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.

What does the em_register_identity tool do? +

Register a new ERC-8004 identity on-chain (gasless via Facilitator). The Facilitator pays all gas fees. The minted ERC-721 NFT is transferred to the specified wallet address. Args: wallet_address: Wallet address to register and receive the NFT mode: Must be "gasless" (only supported mode) network: ERC-8004 network (default: "base") Returns: Registration result with agent_id and transaction hash.. It is categorised as a Write tool in the Execution Market MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.

How do I enforce a policy on em_register_identity? +

Register the Execution Market MCP server in PolicyLayer and add a rule for em_register_identity: 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.

What risk level is em_register_identity? +

em_register_identity is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit em_register_identity? +

Yes. Add a rate_limit block to the em_register_identity 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.

How do I block em_register_identity completely? +

Set action: deny in the PolicyLayer policy for em_register_identity. 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.

What MCP server provides em_register_identity? +

em_register_identity 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.

Enforce policy on every Execution Market tool call.

Deterministic rules across all 38 Execution Market tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.

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