custom_sync_program_member_data
A write tool on the Marketo MCP server.
This record as markdown: /tools/tyron-pretorius-marketo-mcp/custom-sync-program-member-data.md
What custom_sync_program_member_data does on Marketo MCP Server
AI agents use custom_sync_program_member_data to create or update resources in Marketo MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Marketo MCP Server environment.
Why custom_sync_program_member_data is rated Medium
The name implies a sync operation that writes or updates program member data in Marketo. 'Sync' operations typically create or update records. The severity is high given the potential blast radius of modifying member data across a program. Confidence is low because the description is empty, so the exact behavior is uncertain — it could range from a read/write sync to something more destructive.
From the tool's definition Tool name 'custom_sync_program_member_data' suggests synchronizing/writing program member data in Marketo
Attacks that exploit this kind of access
The rule that runs custom_sync_program_member_data safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Marketo MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For custom_sync_program_member_data, this is the rule to start with:
custom_sync_program_member_data stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Marketo MCP Server, apply this rule, and every custom_sync_program_member_data call is checked against it from then on.
Questions about custom_sync_program_member_data
custom_sync_program_member_data is a write tool on the Marketo MCP Server MCP server. It is categorised as a Write tool in the Marketo MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Marketo MCP Server MCP server in PolicyLayer and add a rule for custom_sync_program_member_data: 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 Marketo MCP Server. Nothing to install.
custom_sync_program_member_data is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the custom_sync_program_member_data 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 custom_sync_program_member_data. 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.
custom_sync_program_member_data is provided by the Marketo MCP Server MCP server (tyron-pretorius/marketo-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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