Restores a backup to a Cloud SQL instance. The target_instance and target_project must be provided and populated in the request. The backup identifier can be provided in several ways: 1. A backup_run_id (which is an integer). 2. A backup URI of the format projects/{project-id}/backups/{backup-uid...
Part of the Mcp server.
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AI agents use restore_backup to create or modify resources in Mcp. 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 restore_backup 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 Mcp.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
{
"version": "1",
"default": "deny",
"tools": {
"restore_backup": {
"limits": [
{
"counter": "restore_backup_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}See the full Mcp policy for all 15 tools.
These attack patterns abuse exactly the kind of access restore_backup gives an agent. Each links to the full case and the policy that stops it:
Other write tools across the catalogue. The same approach applies to each: rate-limit and validate the arguments.
Restores a backup to a Cloud SQL instance. The target_instance and target_project must be provided and populated in the request. The backup identifier can be provided in several ways: 1. A backup_run_id (which is an integer). 2. A backup URI of the format projects/{project-id}/backups/{backup-uid}. 3. A backup URI of the format projects/{project-id}/locations/{location}/backupVaults/{backupvault}/dataSources/{datasource}/backups/{backup-uid}. Use the identifier to populate the backup_id field in the request. The source_project must be populated in the request. If the identifier is a backup_run_id, the source_project will be provided. If the identifier is a backup URI, the source_project may need to be extracted from the URI. Do not confuse the extracted source_project with the target_project, which will be provided in other ways. In addition, if the identifier is a backup_run_id, the source_instance must be provided and populated in the request. Do not try to create the instance before the restore, the restore itself will create the instance if needed. Confirm the parameters with the user before executing the restore.. It is categorised as a Write tool in the Mcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the MCP server in PolicyLayer and add a rule for restore_backup: 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 Mcp. Nothing to install.
restore_backup 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 restore_backup 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 restore_backup. 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.
restore_backup is provided by the MCP server (https://sqladmin.googleapis.com/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 15 Mcp tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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