podbc_spasql_query

THE RISK

High Risk

Why podbc_spasql_query needs a policy

SPASQL is a hybrid SPARQL/SQL query language. Executing arbitrary SPASQL queries can perform reads, writes, or even destructive operations depending on the query content. Since the tool executes queries against a database system with potentially broad capabilities, it falls under Execute. The blast radius is high because a misused query could modify or expose sensitive data across connected database systems.

From the tool's definition "Execute a SPASQL query and return results"

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

POLICY

How to control podbc_spasql_query

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

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "podbc_spasql_query": {
      "limits": [
        {
          "counter": "podbc_spasql_query_rate",
          "window": "minute",
          "max": 10,
          "scope": "grant"
        }
      ]
    }
  }
}

podbc_spasql_query stays usable, but rate-capped — a runaway agent can't fire it dozens of times a minute. Everything else on the server is denied unless you say otherwise.

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

RATE-LIMIT THIS TOOL →

Free to start. No card required.

EXPLORE

Related tools and policies

More Mcp Sqlalchemy tools

Execute podbc_execute_query Execute a SQL query and return results in JSONL format. Execute podbc_execute_query_md Execute a SQL query and return results in Markdown table format. Execute podbc_query_database Execute a SQL query and return results in JSONL format. Execute podbc_sparql_func Tool to use the SPARQL AI support function Execute podbc_virtuoso_support_ai Tool to use the Virtuoso AI support function Read podbc_describe_table Retrieve and return a dictionary containing the definition of a table, including column na Read podbc_filter_table_names Retrieve and return a list containing information about tables whose names contain the sub Read podbc_get_schemas Retrieve and return a list of all schema names from the connected database.

All 14 Mcp Sqlalchemy tools →

Execute tools on other servers

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Go deeper

High-risk tools in Mcp Sqlalchemy → Every high-risk tool this server exposes, in one view.
All high-risk MCP tools → Every high-risk tool across the catalogue, and the policy pattern that contains them.
The MCP Attack Database → Documented attack patterns against MCP deployments — and the policies that stop them.
Agent sandbox → Bounding what an agent can execute and where the boundary should sit.
Least privilege for MCP → Granting agents the minimum tool surface the task needs.
Rate Limiting MCP Tool Calls: A Practical Guide →
MCP Security: Why Prompt Guardrails Aren't Enough →

FAQ

Questions about podbc_spasql_query

What does the podbc_spasql_query tool do? +

Execute a SPASQL query and return results. It is categorised as a Execute tool in the Mcp Sqlalchemy MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.

How do I enforce a policy on podbc_spasql_query? +

Register the Mcp Sqlalchemy MCP server in PolicyLayer and add a rule for podbc_spasql_query: 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 Mcp Sqlalchemy. Nothing to install.

What risk level is podbc_spasql_query? +

podbc_spasql_query is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.

Can I rate-limit podbc_spasql_query? +

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

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

podbc_spasql_query is provided by the Mcp Sqlalchemy MCP server (openlinksoftware/mcp-sqlalchemy-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Mcp Sqlalchemy tool call.

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

CHECK YOUR STACK →