List all indexes on a given table, including index name, whether it is unique, and the index definition.
AI agents call list_indexes to retrieve information from Mcp Postgres Query without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool only retrieves and displays metadata about existing indexes on a table. It has no side effects, does not execute queries, does not modify data, and does not delete anything. It is a pure read operation that explores the database schema.
From the tool's definition Tool name 'list_indexes' and description 'List all indexes on a given table, including index name, whether it is unique, and the index definition' indicate retrieval of metadata without modification or execution.
Attacks that exploit this kind of access
List all indexes on a given table, including index name, whether it is unique, and the index definition. It is categorised as a Read tool in the Mcp Postgres Query MCP Server, which means it retrieves data without modifying state.
Register the Mcp Postgres Query MCP server in PolicyLayer and add a rule for list_indexes: 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 Postgres Query. Nothing to install.
list_indexes 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 list_indexes 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 list_indexes. 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.
list_indexes is provided by the Mcp Postgres Query MCP server (lordbasilaiassistant-sudo/mcp-postgres-query). 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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