Insert a new row/record into an existing table in the PostgreSQL database. Use this tool to add data to your tables. Example: Add a new user with name
AI agents use insert_entry to create or update resources in PostgreSQL MCP Server — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your PostgreSQL MCP Server environment.
This tool creates new records in the database, which is reversible (rows can be deleted). It does not execute arbitrary code, delete data, or move money. The blast radius is medium because an agent could insert incorrect, malicious, or unwanted data into production tables, but the operation can be undone. Confidence is high given the explicit description.
From the tool's definition Tool name 'insert_entry' and description 'Insert a new row/record into an existing table' directly indicate data creation/modification.
Documented attack patterns abuse exactly the kind of access insert_entry gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and PostgreSQL MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for insert_entry:
{
"version": "1",
"default": "deny",
"tools": {
"insert_entry": {
"limits": [
{
"counter": "insert_entry_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}insert_entry 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.
Free to start. No card required.
Insert a new row/record into an existing table in the PostgreSQL database. Use this tool to add data to your tables. Example: Add a new user with name. It is categorised as a Write tool in the PostgreSQL MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the PostgreSQL MCP Server MCP server in PolicyLayer and add a rule for insert_entry: 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 PostgreSQL MCP Server. Nothing to install.
insert_entry 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 insert_entry 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 insert_entry. 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.
insert_entry is provided by the PostgreSQL MCP Server MCP server (vignesh-codes/ai-agents-mcp-pg). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Start from PostgreSQL MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.
Free to start. No card required.
6 PostgreSQL MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.