describe_procedure

THE RISK

Low Risk

Why describe_procedure needs a policy

This tool retrieves and displays metadata about a stored procedure (its definition and properties) without creating, modifying, deleting, or executing it. It is a schema inspection operation with no side effects, consistent with other read operations like describe_table and describe_view on the same server.

From the tool's definition Tool name 'describe_procedure' and description 'Get detailed information about a stored procedure including its definition' indicate data retrieval without modification. The verb 'describe' and 'get' are read-only operations.

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

POLICY

How to control describe_procedure

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 describe_procedure:

policy.json

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

describe_procedure 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.

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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 describe_procedure

What does the describe_procedure tool do? +

Get detailed information about a stored procedure including its definition. 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 describe_procedure? +

Register the MSSQL MCP Server MCP server in PolicyLayer and add a rule for describe_procedure: 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 describe_procedure? +

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

Can I rate-limit describe_procedure? +

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

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

describe_procedure 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 →