Retrieve all tables within a specific dataset with metadata and documentation.
AI agents call get_tables to retrieve information from MCP BigQuery 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 returns information about tables in a dataset—a standard introspection operation with no side effects, reversible actions, code execution, or financial impact. It belongs to the Read category with low severity because exposure poses minimal risk; an AI agent can only enumerate schema information, not alter data or trigger operations.
From the tool's definition Tool name 'get_tables' and description 'Retrieve all tables within a specific dataset with metadata and documentation' indicate a read-only operation.
Attacks that exploit this kind of access
Retrieve all tables within a specific dataset with metadata and documentation. It is categorised as a Read tool in the MCP BigQuery Server MCP Server, which means it retrieves data without modifying state.
Register the MCP BigQuery Server MCP server in PolicyLayer and add a rule for get_tables: 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 BigQuery Server. Nothing to install.
get_tables 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_tables 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_tables. 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_tables is provided by the MCP BigQuery Server MCP server (mousten/mcp-bigquery-server). 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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