[API] Delete a variable for a service in a specific environment ⚡️ Best for: ✓ Removing unused configuration ✓ Security cleanup ✓ Configuration management ⚠️ Not for: × Temporary variable disabling × Bulk variable removal → Prerequisites: service_list → Next steps: deployment_trigger, service_res...
Part of the Railway MCP Server server.
Free to start. No card required.
AI agents may call variable_delete to permanently remove or destroy resources in Railway MCP Server. Without a policy, an autonomous agent could delete critical data in a loop with no way to undo the damage. PolicyLayer blocks destructive tools by default and requires explicit human approval before enabling them.
Without a policy, an AI agent could call variable_delete in a loop, permanently destroying resources in Railway MCP Server. There is no undo for destructive operations. PolicyLayer blocks this tool by default and only allows it when a human explicitly approves the action.
Destructive tools permanently remove data. Block by default. Only enable with explicit approval workflows.
{
"version": "1",
"default": "deny",
"hide": [
"variable_delete"
]
}See the full Railway MCP Server policy for all 38 tools.
These attack patterns abuse exactly the kind of access variable_delete gives an agent. Each links to the full case and the policy that stops it:
Other destructive tools across the catalogue. The same approach applies to each: deny by default, or require human approval.
[API] Delete a variable for a service in a specific environment ⚡️ Best for: ✓ Removing unused configuration ✓ Security cleanup ✓ Configuration management ⚠️ Not for: × Temporary variable disabling × Bulk variable removal → Prerequisites: service_list → Next steps: deployment_trigger, service_restart → Related: variable_list, variable_set. It is categorised as a Destructive tool in the Railway MCP Server MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
Register the Railway MCP Server MCP server in PolicyLayer and add a rule for variable_delete: 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 Railway MCP Server. Nothing to install.
variable_delete is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the variable_delete 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 variable_delete. 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.
variable_delete is provided by the Railway MCP Server MCP server (jason-tan-swe/railway-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 38 Railway MCP Server tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
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