list_all_objects

THE RISK

Low Risk

Why list_all_objects needs a policy

This tool performs schema introspection—a read-only operation that queries metadata to discover what database objects exist. There are no side effects, no code execution, no data modification or deletion. While it reveals schema structure that could inform a malicious agent, the tool itself is passive and non-destructive.

From the tool's definition The tool 'list_all_objects' with description 'List all database objects (tables, views, procedures, indexes) organized by schema' retrieves and enumerates metadata about database objects without modifying, executing, or deleting anything.

Documented attack patterns abuse exactly the kind of access list_all_objects gives an agent:

POLICY

How to control list_all_objects

PolicyLayer is an MCP gateway — it sits between your AI agents and MSSQL MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for list_all_objects:

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "list_all_objects": {}
  }
}

list_all_objects is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

Create a free account and register MSSQL MCP Server — nothing to install.
Add this policy — paste it, or build it visually.
Point your MCP client (Claude, Cursor, anything) at your gateway URL.

CAP THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More MSSQL MCP Server tools

Destructive delete_index Delete an index Destructive delete_procedure Delete a stored procedure Destructive delete_view Delete a view Execute execute_procedure Execute a stored procedure with optional parameters Write create_index Create a new index Write create_procedure Create a new stored procedure Write create_table Create a new table in the database Write create_view Create a new view

All 23 MSSQL MCP Server tools →

Read tools on other servers

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Go deeper

The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Data exfiltration → How read access becomes an exfiltration channel when chained with untrusted content.
MCP token cost → What connecting this server costs in context-window tokens on every request.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about list_all_objects

What does the list_all_objects tool do? +

List all database objects (tables, views, procedures, indexes) organized by schema. It is categorised as a Read tool in the MSSQL MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on list_all_objects? +

Register the MSSQL MCP Server MCP server in PolicyLayer and add a rule for list_all_objects: 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 MSSQL MCP Server. Nothing to install.

What risk level is list_all_objects? +

list_all_objects is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit list_all_objects? +

Yes. Add a rate_limit block to the list_all_objects 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 list_all_objects completely? +

Set action: deny in the PolicyLayer policy for list_all_objects. 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 list_all_objects? +

list_all_objects is provided by the MSSQL MCP Server MCP server (jensenloke/mcp-sqlserver-pro). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every MSSQL MCP Server tool call.

Start from MSSQL MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

CHECK YOUR STACK →