PostgreSQL_list_indexes
List all indexes on a specific table.
This record as markdown: /tools/mukul975-postgres-mcp-server/postgresql-list-indexes.md
What PostgreSQL_list_indexes does on Postgres
AI agents call PostgreSQL_list_indexes to retrieve information from Postgres without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
Why PostgreSQL_list_indexes is rated Low
This tool retrieves metadata about database indexes on a table. It performs a query operation that returns information without creating, modifying, or deleting any data or schema objects. The blast radius of misuse is minimal—an agent could at worst retrieve index information it shouldn't see, but cannot alter the database state. This is a classic Read category tool.
From the tool's definition Tool name 'list_indexes' and description 'List all indexes on a specific table' indicate a retrieval operation with no modification or destructive capability.
Attacks that exploit this kind of access
The rule that runs PostgreSQL_list_indexes safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Postgres, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For PostgreSQL_list_indexes, this is the rule to start with:
PostgreSQL_list_indexes is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Postgres, apply this rule, and every PostgreSQL_list_indexes call is checked against it from then on.
Questions about PostgreSQL_list_indexes
List all indexes on a specific table. It is categorised as a Read tool in the Postgres MCP Server, which means it retrieves data without modifying state.
Register the Postgres MCP server in PolicyLayer and add a rule for PostgreSQL_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 Postgres. Nothing to install.
PostgreSQL_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 PostgreSQL_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 PostgreSQL_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.
PostgreSQL_list_indexes is provided by the Postgres MCP server (mukul975/postgres-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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