AI agents call get_base_schema to retrieve information from Airtable MCP without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool retrieves schema metadata about an Airtable base (tables, fields, types, relationships, etc.) without creating, modifying, or deleting any data. It is purely informational and carries minimal risk. Low severity reflects the fact that schema information itself is typically non-sensitive, though access to it could inform further attacks.
From the tool's definition Tool description states 'Get complete schema information' — a retrieval operation with no modification or side effects. The verb 'get' and use case of querying schema metadata confirm read-only behavior.
Documented attack patterns abuse exactly the kind of access get_base_schema gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Airtable MCP, and nothing reaches the server without passing your rules. This is the rule we recommend for get_base_schema:
{
"version": "1",
"default": "deny",
"tools": {
"get_base_schema": {}
}
}get_base_schema is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.
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Get complete schema information for a base. It is categorised as a Read tool in the Airtable MCP MCP Server, which means it retrieves data without modifying state.
Register the Airtable MCP server in PolicyLayer and add a rule for get_base_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 Airtable MCP. Nothing to install.
get_base_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_base_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_base_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_base_schema is provided by the Airtable MCP server (rashidazarang/airtable-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 45 Airtable MCP tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
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45 Airtable MCP tools catalogued and risk-classified — across an index of 42,500+ MCP servers.