Create new custom fields or modify existing fields on any Salesforce object: - Field Types: Text, Number, Date, Lookup, Master-Detail, Picklist etc. - Properties: Required, Unique, External ID, Length, Scale etc. - Relationships: Create lookups and master-detail relationships - Automatically gran...
AI agents use salesforce_manage_field to create or update resources in Salesforce MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Salesforce MCP Server environment.
This tool creates or modifies data structures (custom fields) in Salesforce, which is reversible through deletion or modification. While it affects system configuration and could have broad impact (high severity due to ability to modify any object and grant permissions), it is fundamentally a Write operation rather than Destructive since field modifications and creations can be undone.
From the tool's definition Tool description explicitly states it can 'Create new custom fields or modify existing fields on any Salesforce object' with various properties like 'Required, Unique, External ID' and 'Create lookups and master-detail relationships'.
Risk signalsAdmin/system-level operation
Documented attack patterns abuse exactly the kind of access salesforce_manage_field gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Salesforce MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for salesforce_manage_field:
{
"version": "1",
"default": "deny",
"tools": {
"salesforce_manage_field": {
"limits": [
{
"counter": "salesforce_manage_field_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}salesforce_manage_field 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.
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Create new custom fields or modify existing fields on any Salesforce object: - Field Types: Text, Number, Date, Lookup, Master-Detail, Picklist etc. - Properties: Required, Unique, External ID, Length, Scale etc. - Relationships: Create lookups and master-detail relationships - Automatically grants Field Level Security to System Administrator (or specified profiles) Examples: Add Rating__c picklist to Account, Create Account lookup on Custom Object Note: Use grantAccessTo parameter to specify profiles, defaults to System Administrator. It is categorised as a Write tool in the Salesforce MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Salesforce MCP Server MCP server in PolicyLayer and add a rule for salesforce_manage_field: 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 Salesforce MCP Server. Nothing to install.
salesforce_manage_field 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 salesforce_manage_field 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 salesforce_manage_field. 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.
salesforce_manage_field is provided by the Salesforce MCP Server MCP server (tsmztech/mcp-server-salesforce). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 8 Salesforce MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
8 Salesforce MCP Server tools catalogued and risk-classified — across an index of 42,500+ MCP servers.