Get comprehensive schema information for a table including columns, data types, primary key, indexes, and foreign key relationships.
AI agents call get_table_schema to retrieve information from MSSQL MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and retrieves structural information about database tables (schema metadata) with no side effects. It is a pure read operation that inspects database structure but does not create, modify, delete, or execute any data transformations. The low severity reflects minimal blast radius—exposure of schema metadata alone does not compromise data integrity or trigger unwanted transactions.
From the tool's definition Tool name 'get_table_schema' and description 'Get comprehensive schema information for a table including columns, data types, primary key, indexes, and foreign key relationships' indicates retrieval of metadata without modification.
Attacks that exploit this kind of access
Get comprehensive schema information for a table including columns, data types, primary key, indexes, and foreign key relationships. It is categorised as a Read tool in the MSSQL MCP Server MCP Server, which means it retrieves data without modifying state.
Register the MSSQL MCP Server MCP server in PolicyLayer and add a rule for get_table_schema: 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.
get_table_schema 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 get_table_schema 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 get_table_schema. 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.
get_table_schema is provided by the MSSQL MCP Server MCP server (jpcanter/sql-server-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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