Retrieve and return a dictionary containing the definition of a table, including column names, data types, nullable,
AI agents call podbc_describe_table to retrieve information from Mcp Sqlalchemy without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves table metadata (column definitions, types, nullability) without creating, modifying, deleting, or executing any data-altering operations. It is a passive schema inspection operation with no side effects, fitting the Read category. The low severity reflects minimal risk even if misused by an agent—reading table structure poses no data loss or security compromise beyond information disclosure.
From the tool's definition Tool name 'podbc_describe_table' and description 'Retrieve and return a dictionary containing the definition of a table, including column names, data types, nullable' indicate a read-only operation that fetches schema metadata without modifying or executing…
Documented attack patterns abuse exactly the kind of access podbc_describe_table gives an agent:
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_describe_table:
{
"version": "1",
"default": "deny",
"tools": {
"podbc_describe_table": {}
}
}podbc_describe_table is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Retrieve and return a dictionary containing the definition of a table, including column names, data types, nullable,. It is categorised as a Read tool in the Mcp Sqlalchemy MCP Server, which means it retrieves data without modifying state.
Register the Mcp Sqlalchemy MCP server in PolicyLayer and add a rule for podbc_describe_table: 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.
podbc_describe_table is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the podbc_describe_table 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 podbc_describe_table. 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.
podbc_describe_table 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.
Start from Mcp Sqlalchemy, 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.
14 Mcp Sqlalchemy tools catalogued and risk-classified — across an index of 43,000+ MCP servers.