# marketo_get_lead_by_id

Retrieve a lead by its numeric Marketo ID. Optionally specify which fields to return (defaults to standard fields). Returns lead record with all requested field values.

Agent View of the PolicyLayer registry record for `marketo_get_lead_by_id`. HTML page: https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-lead-by-id

## Facts

- Tool: `marketo_get_lead_by_id`
- Server: Marketo MCP Server (`alexleventer/marketo-mcp`) — https://policylayer.com/tools/alexleventer-marketo-mcp.md
- Homepage: https://github.com/alexleventer/marketo-mcp
- Risk category: Read (Low risk)
- Registry record: grade F, identity unverified
- Server rate-limited: no
- Parameters: 0
- Recommended policy verdict: Allowed

## Example call (MCP tools/call, JSON-RPC 2.0)

```json
{
  "jsonrpc": "2.0",
  "id": 1,
  "method": "tools/call",
  "params": {
    "name": "marketo_get_lead_by_id",
    "arguments": {}
  }
}
```

## Why marketo_get_lead_by_id is rated Low

This tool retrieves existing lead data without modifying, deleting, or executing any operations. It is a simple query operation that returns information based on a numeric ID parameter. The blast radius is minimal—worst case, an AI agent could retrieve sensitive PII, but the tool itself enables only read access to existing records.

From the tool's own definition: "Tool name contains 'get', description states 'Retrieve a lead by its numeric Marketo ID' and 'Returns lead record'. No modification, deletion, or execution occurs."

## Use case

AI agents call marketo_get_lead_by_id to retrieve information from Marketo MCP Server without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

## Recommended policy (PolicyLayer)

Verdict: **Allowed**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Marketo MCP Server:

```json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "marketo_get_lead_by_id": {}
  }
}
```

## Other tools on Marketo MCP Server (26)

- `marketo_delete_channel` — Destructive — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-delete-channel.md
- `marketo_delete_lead` — Destructive — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-delete-lead.md
- `marketo_send_sample_email` — Execute — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-send-sample-email.md
- `marketo_get_channel_by_id` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-channel-by-id.md
- `marketo_get_channels` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-channels.md
- `marketo_get_email_by_id` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-email-by-id.md
- `marketo_get_emails` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-emails.md
- `marketo_get_form_by_id` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-form-by-id.md
- `marketo_get_forms` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-forms.md
- `marketo_get_lead_activities` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-lead-activities.md
- `marketo_get_lead_by_email` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-lead-by-email.md
- `marketo_get_lead_changes` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-lead-changes.md
- `marketo_get_lead_lists` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-lead-lists.md
- `marketo_get_program_by_id` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-program-by-id.md
- `marketo_get_program_members` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-program-members.md
- `marketo_get_programs` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-programs.md
- `marketo_get_smart_list_by_id` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-smart-list-by-id.md
- `marketo_get_smart_lists` — Read — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-get-smart-lists.md
- `marketo_add_lead_to_list` — Write — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-add-lead-to-list.md
- `marketo_approve_form` — Write — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-approve-form.md
- `marketo_clone_form` — Write — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-clone-form.md
- `marketo_clone_program` — Write — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-clone-program.md
- `marketo_create_channel` — Write — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-create-channel.md
- `marketo_create_or_update_lead` — Write — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-create-or-update-lead.md
- `marketo_remove_lead_from_list` — Write — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-remove-lead-from-list.md
- `marketo_update_channel` — Write — https://policylayer.com/tools/alexleventer-marketo-mcp/marketo-update-channel.md

## For agents

This record is a snapshot. Live verdicts and the full registry:

- Check every server in your MCP config at once: `npx -y policylayer stack`
- Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md)
- Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events`

---

Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=alexleventer-marketo-mcp · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/alexleventer-marketo-mcp