Provision a fresh Postgres database on instanode.dev. pgvector is pre-installed. Returns a standard postgres:// connection URL that any driver can use directly as DATABASE_URL — no wrapper SDK, no setup. The 'name' field is required (the human label surfaced on the dashboard). Without INSTANODE...
Part of the Instanode MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents use create_postgres to create or modify resources in Instanode. 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 create_postgres repeatedly, creating or modifying resources faster than any human could review. Intercept's rate limiting ensures write operations happen at a controlled pace, and argument validation catches malformed or unexpected inputs before they reach Instanode.
Write tools can modify data. A rate limit prevents runaway bulk operations from AI agents.
tools:
create_postgres:
rules:
- action: allow
rate_limit:
max: 30
window: 60See the full Instanode policy for all 6 tools.
Agents calling write-class tools like create_postgres have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Write risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
Provision a fresh Postgres database on instanode.dev. pgvector is pre-installed. Returns a standard postgres:// connection URL that any driver can use directly as DATABASE_URL — no wrapper SDK, no setup. The 'name' field is required (the human label surfaced on the dashboard). Without INSTANODE_TOKEN: free tier — 10 MB, 2 connections, expires in 24h, capped at 5 provisions/day per /24 subnet. With INSTANODE_TOKEN (paid): 500 MB, 5 connections, permanent, no subnet cap. Store the connection_url in an env var (DATABASE_URL); do not hardcode it.. It is categorised as a Write tool in the Instanode MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Add a rule in your Intercept YAML policy under the tools section for create_postgres. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Instanode MCP server.
create_postgres 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 create_postgres rule in your Intercept 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 Intercept policy for create_postgres. 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.
create_postgres is provided by the Instanode MCP server (@instanode/mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Open source. One binary. Zero dependencies.
npx -y @policylayer/intercept