pg_doc_modify

Update documents matching a filter. Set fields with

SERVERPostgreSQL MCP Server SOURCE@neverinfamous/postgres-mcp

Medium RISK CLASS

Category Write

Parameters 00 required

Recommended Rate-limitedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/io-github-neverinfamous-postgres-mcp/pg-doc-modify.md

WHAT IT DOES

What pg_doc_modify does on PostgreSQL MCP Server

AI agents use pg_doc_modify 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.

RISK

Why pg_doc_modify is rated Medium

The tool performs reversible updates to documents based on filter criteria. While potentially impactful if misapplied to wrong records, updates are not irreversible (Destructive) and do not execute arbitrary code (Execute). The high severity reflects that bulk document modifications affecting multiple records could have significant business impact if the filter selects unintended documents.

From the tool's definition Tool name 'pg_doc_modify' combined with description 'Update documents matching a filter. Set fields with' indicates modification of data records.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs pg_doc_modify safely

PolicyLayer is an MCP gateway: it sits between your AI agents and PostgreSQL MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For pg_doc_modify, this is the rule to start with:

pg_doc_modify Rate-limited

pg_doc_modify 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.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "pg_doc_modify": {
      "limits": [
        {
          "counter": "pg_doc_modify_rate",
          "window": "minute",
          "max": 30,
          "scope": "grant"
        }
      ]
    }
  }
}

LIMIT THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect PostgreSQL MCP Server, apply this rule, and every pg_doc_modify call is checked against it from then on.

FAQ

Questions about pg_doc_modify

What does the pg_doc_modify tool do? +

Update documents matching a filter. Set fields with. 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.

How do I enforce a policy on pg_doc_modify? +

Register the PostgreSQL MCP Server MCP server in PolicyLayer and add a rule for pg_doc_modify: 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.

What risk level is pg_doc_modify? +

pg_doc_modify is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.

Can I rate-limit pg_doc_modify? +

Yes. Add a rate_limit block to the pg_doc_modify 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.

How do I block pg_doc_modify completely? +

Set action: deny in the PolicyLayer policy for pg_doc_modify. 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.

What MCP server provides pg_doc_modify? +

pg_doc_modify is provided by the PostgreSQL MCP Server MCP server (@neverinfamous/postgres-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

KEEP EXPLORING

What pg_doc_modify does on PostgreSQL MCP Server

Why pg_doc_modify is rated Medium

The rule that runs pg_doc_modify safely

Questions about pg_doc_modify

More on PostgreSQL MCP Server, and thousands of servers like it.