Get the schema (column information) for a specific measurement/table (all versions). Shows column names, types, and categories (time/tag/field).
AI agents call get_measurement_schema to retrieve information from InfluxDB MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
The tool retrieves metadata about database schema (column names, types, categories) without any side effects. It is a read-only query operation that does not create, modify, delete, or execute any operations. The blast radius of misuse is minimal—an attacker gains information about table structure but cannot manipulate or access actual data records, execute code, or cause irreversible changes.
From the tool's definition Tool description states it 'Get[s] the schema (column information) for a specific measurement/table' and 'Shows column names, types, and categories'. This is purely informational retrieval with no modification, deletion, or execution capabilities.
Attacks that exploit this kind of access
Get the schema (column information) for a specific measurement/table (all versions). Shows column names, types, and categories (time/tag/field). It is categorised as a Read tool in the InfluxDB MCP Server MCP Server, which means it retrieves data without modifying state.
Register the InfluxDB MCP Server MCP server in PolicyLayer and add a rule for get_measurement_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 InfluxDB MCP Server. Nothing to install.
get_measurement_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_measurement_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_measurement_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_measurement_schema is provided by the InfluxDB MCP Server MCP server (quorralyne/mcp_test_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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